Door Chime, Wireless Door Open Contact Sensor Alarm with 500 FT Range, 58 Chimes and 5 Volume Levels for Business/Store/Home/Office When Entering, 3 Transmitter + 2 Plug-in Receiver

Easy to InstallThe sensor and receiver come pre-paired, so you simply attach the transmitter, plug the receiver into any standard outlet, select a tone you prefer, and you're ready to go. Built to LastPowered by one standard household AAA battery and engineered with Ultra-Low-Power design, the sensor can easily last 1-2 years, reducing the need for frequent battery changes and saving you both time and money. A Must-HaveWith a reliable 500FT working range, it provides a perfect entry alert chime when a door opens, ideal for both home and business use.

What about an insecure front door, child safety gate, upstairs window, cabinet, basement door. you decide. Mute to 120dBIt offers 58 unique long and short tones with 5 adjustable volume levels. The maximum volume of 120dB is loud enough to be heard throughout the house, ensuring you never miss an alert. Prefer not to be disturbed? Simply set it to mute