White. This Amalock PIR motion detector is designed for the use with the ALM5100 smart alarm. It is suitable for internal use and is supplied with fixings. Whenever the sensor detects movement (only while the alarm is armed), a push notification including the sensor name will be automatically sent to the registered users, and the alarm will sound.. Slimline design. CR2450 3V lithium battery included. Supplied with fixings. Low battery warning