Features 1、Made of high quality housing material, which is reliable, sturdy and durable with long service life. 2、It features high sensitivity, 20m/65.6ft long Remote Control Distance and simple operation, easy to use. 3、Wireless remote control and super loudly 105dB alarm, effectively scare the thief away and keep you safe. 4、Door bell function, reminding people in house of opening door for you, suitable for rent apartment, villa and home security. 5、Small size and compact appearance, reasonable and practical, which bring you much convenience. Specifications Condition: 100% Brand New Item Type: Door Alarm Sensor Material: ABS Decibel: 105db Remote Control Distance: 20m / 65.6ft Remote Control Battery: 23A Battery (Not Included) Alarm Battery: 1 x 9V Battery (Not Included) Weight: Approx. 80g / 2.8oz Package List 1 x Door Alarm Sensor (Battery Not Included) 1 x Remote Control (Battery Not Included)