Alarm Systems
alarm systems — pre-owned
Browse 787 alarm systems — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.

SimpliSafe 6 Piece Wireless Home Security System - White
Ready to protect, right out the box. Easy to install on every type of door or window. Deter intruders. We include a Yard Sign free with your system. Batteries, Security Decals, Yard Sign, and 3 ft. Stake.
You save $235.00

SimpliSafe Home Security System Lot 2 Base Stations+Sensors Motion Glass Break !
SimpliSafe Home Security System Bundle – Fully Functional and in brand new condition! Fully tested Includes everything shown: • 2x Base Stations (with power adapters and stands) • Multiple entry sensors (doors/windows) • 2x motion detectors • 2x glass break sensors • Keypad with panic button • Key fob remote • Extra batteries included All components are tested and working properly. Great for setting up or expanding a SimpliSafe system. No contract required – works with or without monitoring. Condition: Clean, very lightly used, fully operational. Originally over $500 for the system! Good with GEN two and GEN three

SimpliSafe Home Security System 2 Outdoor Cameras Keypad Wireless Wi-Fi
USED:The SimpliSafe Home Security System with 2 Outdoor Cameras offers a comprehensive solution for your home security needs. This wireless system includes two outdoor cameras, a keypad for control, motion sensors, and an alarm. The cameras are powered by batteries with a voltage of 3V, providing reliable security monitoring indoors and outdoors. The system features a white color design, Wi-Fi connectivity for smart home integration, and can be easily set up with a wall plug-in power source. With SimpliSafe's brand reputation and included features, this home security system provides peace of mind for your home and garden.

DSC PC1864 64 Zone PowerSeries Board
Good board

eufy 5-Piece Home Alarm Security System Kit Keypad Entry/Motion Sensor|Refurbish
Instant Alerts: Get notified as soon as motion or a breach is detected with the eufy Security app. Easy Setup: Install in minutes all by yourself. The entry sensors attach to doors and windows, while the motion sensor and keypad can be secured to walls via the included mounts.
You save $89.25

Qolsys QS7133-840 16-F Hardwired to Wireless Translator iQ2- iQ4-NEW OPEN BOX
Once we confirm and agree to your request, you may then place your order.Donot leave new requests in the order notes after purchasing. We stand behind our products. Do not place an order and then request a cancellation afterward.
You save $0.88

Lot of 4 GE Interlogix Wireless Door Window Sensors 319.5MHz Simon Concord Caddx
Caddx: NX-4, NX-6, NX-8. GE Simon: XT, XTi, Version 2 & 3. You will need your own magnets and CR2032 batteries for installation. Frequency: 319.5 MHz.

ALARM.COM CD-410-US-VZ Verizon LTE & IP Dual Path for UTC Interlogix Concord 4
To the best of our professional knowledge, these specific modules/communicators fall within the language of: in part ". all units in the field". ONLY the below listed radios/firmware/panel versions (other legacy LTE radios, except 2g/3g radios, may very well work with this Gateway but we disclaim any not listed below since we did not test all different possible combinations).

Mighty Mule FM231 Wireless Driveway Alarm Vehicle Detection Alert System 400ft
Mighty Mule FM231 Wireless Driveway Alarm provides a reliable vehicle detection alert for homes, workplaces, or rural properties. This system utilizes electromagnetic technology to detect moving vehicles within a 400-foot wireless range, specifically designed to ignore people, animals, and wind to prevent false alarms. The kit includes a transmitter module, sensor, indoor receiver with chime, transformer, and a three-piece mounting post. Ideal for monitoring long driveways or property entrances, the indoor receiver features LED indicators for power, visitor alerts, and low battery status. This unit is easy to install and requires two AA batteries for the transmitter (not included). This is an open box item. Please ensure all parts needed appear in photos.

FCPS-24FSPCA Rev U Controller PCB board
FPCPS-24FSPCA REV_ For Notifier system in great condition. Was removed from a panel was being demo. sold as is please see pictures . Will be would protect shipped

Ring Alarm Base Station + 7 Contact Sensors (1st Gen)
X 6.65 in. X 1.46 in. • 24/7 Alarm Professional Monitoring. • Alarm Cellular Backup. 100 - 240V 50/60Hz, AC adapter included. Cellular Backup included with compatible Ring subscription. • “Works with Ring” Compatible.

Hardwire Zone Expander HWB416 For APEX Destiny 6100 System
Hardwire 16 Zone Expander for Honeywell (Ademco) APEX Destiny 6100 system. Note - this is for APEX only, not compatible with Vista panels. Good unit, was fully functional when removed from service. Free shipping. 10% of your payment goes directly to charity through eBay. Thank You.

Honeywell LYNX Touch L5000 Wireless Security Control Panel With Transformer
This system is in very good condition to be used. The panel has been defaulted back to factory settings. The installer code is 4112.

Ring Alarm 2nd Gen Security System – Base + 6 Sensors + Extender (No Keypad)
Range Extender. - Keypad is NOT included. - Panic Button (box included, see photos). All components have been well cared for and are fully functional. System has been reset and is ready for a new owner.

GE INTERLOGIX CADDX NX-148E LCD KEYPAD
The GE Interlogix Caddx NX-148E LCD Keypad is a high-quality keypad designed for use with home security systems. With its sleek design and user-friendly interface, this keypad allows for easy control and monitoring of your alarm system. The GE brand ensures reliability and durability, while the NX-148 model provides advanced features for added convenience and protection. Perfect for enhancing your home security setup, the GE Interlogix Caddx NX-148E LCD Keypad is a practical and effective choice for homeowners looking to improve their safety and peace of mind.

Honeywell Lynx Touch L5000 Wireless Alarm System Touchscreen Keypad Sensors
The Honeywell Lynx Touch L5000 Wireless Alarm System is a complete home security solution that includes a touchscreen keypad and sensors. Powered by batteries, this indoor-only system features wireless connectivity for easy installation and operation. The sleek white design fits seamlessly into any home environment, providing a convenient and reliable way to protect your property. The touchscreen feature enhances the user experience, making it simple to arm and disarm the system with just a touch of a button.

Napco MAGNUM ALERT 900 PANEL Only

GE Concord 4 Security Panel (600-1021-95R)
Barely used, GE Concord 4 Security Panel (600-1021-95R). A built-in RF receiver with 96-zone capacity provides instant compatibility with the complete line of GE Security Learn Mode sensors. • Compatible with all GE Security crystal and SAW Learn Mode sensors.

Qolsys IQ Panel 4 Alarm Control Panel IQP4004 LTE Touchscreen - NO BACK COVER
The unit includes the necessary alarm components and is wall-mounted for optimal visibility and accessibility.

Honeywell L5210 Wireless panel , LTE-L57V LTE Communicator
USED TESTED PANEL AND NEW CELL UNIT. PANEL AND CELL UNIT.

Qolsys IQ Panel 4 IQP4004 PowerG 319.5MHz Alarm Control Panel LTE
Removed from working environment. Require requires factory reset and reactivation by an installer or qualified technician. Includes power, adapter and power plug.

ALARM.COM CD-410-US-VZ Verizon LTE & IP Dual Path for Concord 4

GE Simon XT 600-1054-95R Wireless Security ALARM PANEL BOARD
GE Simon XT 600-1054-95R Wireless Security ALARM PANEL BOARD. Condition is Used. Shipped with USPS Ground Advantage.

PROTAKEOVER Honeywell (Resideo) Takeover Module for Z-Wave Communications

Clarity AlertMaster Visual Alert Deaf AL10 AL11 & AL12 Bed Shaker/Doorbell READ
The Clarity AlertMaster AL10 AL11 & AL12 Bed Shaker/Doorbell is a digital telephone accessory designed for those who are deaf or hard of hearing. It features a wall plug-in power source and includes a doorbell and bed shaker for visual alerts. The black device also has a clock and light sensor for added convenience. Made in China, this model (52510) by Clarity is an innovative home security solution that provides peace of mind for individuals with hearing impairments. This set has only one wireless doorbell. Comes with the clock, one wireless door bell, 2 alert modules. DOES NOT COME WITH THE CIRCULAR SENSOR

HONEYWELL LYNX TOUCH L5000 WIRELESS HOME or OFFICE SECURITY ALARM ADT PANEL
1 x L5000 Touch Screen Panel - used. APL can be selected when using Honeywell GSM and IP communicators. Supports two end-user phone numbers. 16 user codes (Installer, Master, plus 14 Secondary, including Duress and Babysitter).

Linear Transmitter DXS-25 Handheld 315MHz 5 Button 8 Channel DXS25 B-7
The Model DXS-25 Supervised 5-Button, 8-Channel Handheld Transmitter is a supervised, digitally coded radio transmitter designed for use with Linear’s DX and DXS Format receivers. To send a complete signal, press the transmitter button for a minimum of 2 seconds.

DSC PC1616 V4.22NA ALARM CONTROL BOARD
BOARD IS DEFAULTED TO FACTORY DEFAULT SETTINGS BOARD IS IN GOOD CONDITION - OPERATIONAL WHEN REMOVED FROM SERVICE - TESTED AND DEFAULTED TO FACTORY SETTINGS - SEE PICTURES FOR MORE ON THE CONDITION. SUPPORTS UP TO 32 WIRELESS ZONES WITH ADDED WIRELESS RECEIVER.

Elk-M1GCB Cross Platform Control Wall Mount This Is The Mount Only
This is just the wall mount. Keys included.

UTC Interlogix GE NetworX NX-1820E TouchScreen Keypad
Tested excellent condition The UTC Interlogix GE NetworX NX-1820E TouchScreen Keypad is a sleek white keypad designed for home security alarm systems. Manufactured by Interlogix, this model features a user-friendly touch screen interface for easy navigation and control of your alarm system. With its reliable brand reputation and advanced technology, this keypad provides a convenient and efficient way to manage your home security system.

X-Sense Wireless Interconnected Combo Smoke/CO2 Detector 2-pack 10 yr Battery
These detectors feature a 10-year sealed lithium battery, providing long-lasting protection for your family. They are interconnected, so if one alarm sounds, they all sound, ensuring everyone is alerted, no matter where they are in the house.

Qolsys IQPanel4 Touch Screen Keypad White 7V Home Alarm System Panel MPN IQP4001
Qolsys IQPanel4 Touch Screen Keypad White 7V Home Alarm System Panel MPN IQP4001

MN02-LTE-M - M2M Universal Cellular AT&T LTE Alarm Communicator
Removed from working system. In excellent condition.

EPS-11S power supply RE012-16 for Xfinity Home REHP1AZ0 Model AMS177-1202000SU-T
eps-11s power supply for Xfinity Home reho1Az0 Model AMS177-1202000SU
You save $1.00

Qolsys QS9201-1200-840 IQ Panel 2 GE 3 DOOR KIT + 6 MONTHS ALARM MONITORING USED
USED TESTED IQ 2 GE PANEL VERZION KIT WITH PANEL, 3 DOORS,1 MOTION PLUS 6 MONTHS OF ALARM MONITORING INCLUDED. 6 Months of prepaid central station monitoring for CELLULAR WITH INTERACTIVE PHONE APP COMMUNICATION.

GSM Temperature Humidity Alarm Power Failure SMS Alert (Model: T200)
Used condition.

Blue by ADT LifeShield S30R0-26 Base Station Smart Home Security
Blue by ADT LifeShield S30R0-26 Base Station Smart Home Security. Condition is Used. Shipped with USPS Ground Advantage.
You save $2.80

PI-IDSP Indoor Speaker 15W 8 Ohm for Alarm/Security System (Used)
Bring clear, high-quality sound to your alarm or security system with this PI-IDSP indoor speaker from Revere Industries. Designed for indoor use only, this wired speaker has a power rating of 15 W and an impedance of 8 Ohms to ensure optimal performance. It can be easily mounted on walls for seamless integration into your security setup.

Honeywell Lyric Security System **New Low Price**
This system was installed for around 2 years and was only removed for a change of system. It is 100% fully functional as of removal. All screens are in perfect condition with zero flaws. Added in also is a wired converter panel which makes your legacy installed wired sensors into a wireless communication to the system.

SimpliSafe Gen 3 Wireless Home Security System Base Station Keypad Siren Sensors
This bundle includes the core SSBS3 Base Station with power adapter, an SSKP3 wireless keypad with mounting bracket, a 105dB auxiliary siren for enhanced alerts, an entry sensor for door or window monitoring, and a convenient keychain remote for easy arming and disarming.