Features: This is a complete solar alarm system including 1 alarm host and 3 infrared sensors. It is a practical and environmentally friendly alarm system which is simple and convenient to operate. The infrared sensor can absorb visible light, store power to the battery and can be installed on the ceiling for infrared detection, send signal to the host for sound alarm. The alarm supports to be associated with 32 detectors, can receive door sensor and infrared alarm signals to alarm with built-in speaker. A variety of power supply modes are available: power source or four AA batteries. Specifications: Condition: Brand New Material: ABS Color: Shown as picture Optional Plug Type: AU 110-240V, UK 110-240V, EU 110-240V, US 110-240V Alarm Host: Working Voltage: 12V-15V Backup Power: 4 AA batteries (excluded) Standby Time: 6-8H Standby Current: < 75mA Alarm Current: < 300mA Function: Receive door magnet, infrared alarm signal for alarm Associated Capacity: 32 detectors can be associated. Working Temperature: -10°- 55°C Solar Infrared Sensor: Solar Panel Voltage: 5V Working Voltage: 3.6V Battery Capacity: 800mA Detection Angle: 4° horizontally, 100° vertically Blocking Time: 30s and 120s optional Detection Distance: 0-8m Transmitting Time: 5m Sensitivity Adjustment: H L optional Transmitting Mode: 433 Wireless Transmitting Distance: < 300m Battery Life: ≤ 5 years Working Temperature: -20° ~ 50°C Range of Use: Generally placed on the ceiling toward the ground Package List: 1 * Sound Alarm Host (With 1 user manual, 1 plug, 1 cable) 3 * Infrared Sensor (Each with a user manual, 1 ER26500 lithium battery 800mA, 1 universal bracket, 1 screw bag) 1、This is a complete solar alarm system including 1 alarm host and 3 infrared sensors. 2、It is a practical and environmentally friendly alarm system which is simple and convenient to operate. 3、The infrared sensor can absorb visible light, store power to the battery and can be installed on the ceiling for infrared detection, send signal to the host for sound alarm. 4、The alarm supports to be associated with 32 detectors, can receive door sensor and infrared alarm signals to alarm with built-in speaker. 5、A variety of power supply modes are available: power source or four AA batteries.