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, 5 Transmitters + 2 Plug-in Receivers

Easy to
Install: The sensor and receiver come pre-paired, so you simply need to attach the transmitter, plug the receiver into any standard outlet, choose a tone you prefer, and you are ready to go.
Mute to 120dB: 58 distinct long and short tones with 5 adjustable volume levels. The maximum volume of 120dB is sufficiently loud to be heard throughout the house, ensuring you never miss an alert. Prefer not to be disturbed? Set it to mute.
A Must-Have: 500FT dependable long working range, an ideal entry alert chime when the door opens for home and business use. What about an insecure front door, child safety gate, upstairs window, cabinet, basement door. you decide.
Built to Last: With one standard household AAA battery in the device and an Ultra-Low-Power design, the sensor can readily last 1-2 years. This allows for less frequent battery replacements, saving your time and money