Wireless Door Sensor, BITIWEND Door Chime Doorbell with 600ft Operate Range 58 Chimes 5 Volume Level LED Indicator Door Open Alarm for Business/Office/Home/Store When Entering, 1Sensor+1Receiver

Door Window Open AlarmBITIWEND door chime can be used as an alarm, or as a way to remind businesses on the front door when a customers coming in. Alerting you when someone opens the door or a window, perfect for have children or senior family members.
Up to 58 Ringtones ChoiceDoor sensor offer 58 pop chimes and 5 level adjustable(0-110 dB), different chimes set for different doors so you can know which door you have a visitor come in. LED indicators are suitable for the elderly and hearing impaired.
Up to 600 FT Working RangWireless door chime working rang up to 600ft in open area, completely cover your house or store, ensures you will never miss a visitor.
Note: The battery level will affect the signal receiving range.
ExpandableEach door sensor or receiver can be expandable, you can use them with additional BITIWEND door sensors or doorbells. You can install them in your dining room, bedroom, living room, garage, yard, or your store and office.
Easy to Install to Use Just plug the doorbell receiver into any standard outlet and tear the double-sided adhesive tape on the back of door sensor (or screw mounted) to stick to the door or window, please take the insulating paper away before using the sensor.
BatteryThe battery used in our products is CR1632. Please refer to the manual or consult customer service for battery replacement steps, thank you.