Knock Knock Wireless Door Chime with Vibration Smart Sensor

Be alerted to visitors no matter where you are in the house Product Information Have a hard time hearing when guests arrive because you just can't hear them knocking? Change all that with the Knock Knock Wireless Door Chime. This sensor and receiver set automatically chimes when someone is knocking at your door, alerting you to their arrival. To use, simply attach the sensor to the door using either double sided tape or screws. The sensor will then activate whenever it feels a knocking vibration. The receiver, which has a 100ft connectivity, will then chime in order to alert you to guests! Now you'll never miss another visitor, even if you're all the way in the back of your home or office. Product Features Wireless sensor and receiver set automatically chimes when someone is knocking on the door Wireless receiver makes it easy to hear when guests arrive while in the back part of an office, home, or basement The smart sensor is only activated by a knocking vibration Wireless transmission allows the receiver to be placed anywhere in house or office, up to 100 feet from transmitter Easily mount sensor on inside of door with double-sided tape or screws provided Included Receiver Sensor 23A Battery Note: Battery is included, but not guaranteed. Specifications Color: White Operating Distance: 100 ft. Sensor Power Source: 1 x 23A battery (included) Receiver Power Source: 3 "C" cell batteries (not included) Warranty: One Year Limited Manufacturer Warranty WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.