Door Chime, Door Opened Alarm for Business & Home Safety 600FT Range Door Open Sensor with 58 Chimes, 5 Volume Levels. 4 Sensors + 1 Receiver for Multi-door, Kids & Dementia Safety

A GREAT GIFT for homeowners, people who live alone, the hearing impaired, business partners, or anywhere you need a safeguard.
Easy Installation: The door chime and door sensor are already paired. First, stick the sensor on the door or window (the gap between the two parts should not exceed 0.4 inches), then plug the chime receiver into a socket. Installation is complete!
Upgraded Battery: Using household alkaline batteries with an ultra-low power design, the sensor chime allows the battery to last up to 7200 activations. 600ft Wireless Range and
Expandable Pairing: All door entry chimes and sensor alarms from our brand can be paired with each other, and one receiver or sensor can pair with up to 58 sensors or receivers. With a wireless range of 600ft, it supports long-distance and multiple pairings for homes, businesses, and stores. 58 Optional Ringtones and 5
Volume Levels: With 58 rich and varied ringtones, there is always one that suits your taste! Five volume levels range from 0 to 110DB, letting you choose silence or a loud alert to fit your daily needs. The LED indicator is ideal for the elderly and those with hearing impairments. Our brand has been producing and selling security products since 1993, bringing extensive experience and skill. Please choose us!