Door Chime, Wireless Door Entry Alarm for Home, Store, School 600FT Range Door Open Sensor with 58 Chimes, 5 Volume Levels. 2 Sensors + 2 Receivers for Multi-door, Kids & Dementia Safety

Easy InstallationThe door chime and door sensor come pre-paired. First, attach the sensor to the door or window (the gap between the two parts should stay within 0.4 inches), then plug the chime receiver into an outlet. Thats itinstallation is done! Upgraded BatteryPowered by standard household alkaline batteries and engineered with an ultra-low-power design, this door sensor chime delivers up to 7200 activations per set. 600ft Wireless Range and Expandable PairingAll door entry chimes and sensor alarms in this series are inter-pairable, and a single receiver or sensor can link with up to 58 sensors or receivers.

With a 600ft wireless range, it supports long-distance and multi-unit setups for homes, offices, and retail spaces. 58 Optional Ringtones and 5 Volume LevelsChoose from 58 rich and varied ringtonestheres sure to be one that fits your taste! Five volume levels, from 0 to 110DB, let you pick silence or a loud alert to suit your daily needs. The LED indicator is ideal for elderly users and those with hearing impairments. Our brand has been crafting security products since 1993, backed by solid experience and expertise. We invite you to choose us!