Wireless Home Security Alarm System With Alexa Integration

1 Wired Siren. Infrared Sensor Detector Battery: Use 2 AAA batteries ( include). 4 Infrared Sensor Detector. Alarm Panel Battery: 3.7V, 1000mAh(built-in). Alarm Current:<650mA. Alarm Panel Weight: 231 g/8.1 oz.

eBay