Features 1、Battery Reminding: Low battery alerts in application can achieve real energy savings and timely battery replacement, keeping the normal running of the sensor alarm. 2、Using Method: The sensor's history is viewable and can monitor the condition of the house in real time, as well as a remote control to check how much TV a child is watching at home. 3、Intelligent Linkage: Intelligent automation linked with other smart devices and application, the sensor and smart switch intelligent link. 4、Built In Function: The application software has smart curtain switch, once detected drop or vibration, will open the curtain. 5、Automatic Turn On: When the sensor detects vibration, the smart switch will be triggered to open to provide assurance of monitoring of the home's property. Specifications Item Type: Window Alarm Material: ABS Color: As Picture Shown Application: for Home Security Gross Weight: Approx.36g/1.3oz Voltage: DC 3V Static Current: ≤10μA Alarm Current: ≤20mA Transmission Distance: 10~30m/32.8-98.4ft Product Size: 7x2.5x2cm/2.8x1.0x0.8in Installation: Double Sided Adhesive Or Screw Fixed Battery: 2 AAA Batteries (Not Included) Package List 1 x Sensor 1 x Manual 2 x Expansion Pipe 2 x Screw 1 x Double Sided Adhesive