Door Sensor Chime Alarm System Wireless for Home Security, Coolqiya Entry Bell Alert 600FT Operating Range With 4 Volume Levels, 1 Door Sensor + 1 Plug-in Receiver(White)
- 【600 FT in OPEN AREA RANGE】- 52 Ringtones & 4 Level Volume (25 dB to 110 dB) to Adjust.
- 【How Does Door Sensor Alarm Kit Works?】- Attach 2 sections of sensor to a door/window frame. When you open the door, it will trigger the alarm unit and ring.
- 【Wireless Door Entry Bell Alert System】- Will Keep track of your little children, use for home to alert you when someone open the door; Also use for garage/office/retail store.
- 【Easy To Install & Expand】- Simply get the bell plugged into socket and Tear off the double-sided tape of the sensor and stick it on the door frame. You can add extra 20 receivers/transmitters.
- Friendly customer service in 24hrs to make sure your 100% satisfaction, we offer refund or replacement for the unsatisfied products within 12 months of delivery.