Door Closing Bell Reminder Burglar Alarm Household Aroma Diffuser they will be trained at

they will be trained at the same time and receive the same functional signal synchronously

Type: Sensor

Wireless distance: 100m (open ground)

Sound frequency: 20-25KHZ

This product adopts dual-channel upgrade

Door Closing Bell Reminder Burglar Alarm Household Aroma Diffuser they will be trained atProduct information: Color: white Model: KS SF19UP Installation mode: mounting Package size: 8. 8 * 4. 8 * 3. 8cm Product Feature: 1. Product Size: 3. 4*1. 7*0. 6 inch. 2. 4 in 1 Multi Function General Alarm, Constant Alarm, Closing door Alert (Time Delay), Doorbell. 3. Batteried by 2pcs AAA batteries ( not included ). 4. Self Adhesive, easy to install and operate. 5. 108 dB Loud Alarm can effectively prevent intruder entering through your door