AVANTEK Wireless Doorbell, 1300 Feet Operating Range Door Bells, IP55 Waterproof. Sold by AVANTEK Direct FBA

【1300 FT (400 M) WIRELESS RANGE】: Operating at 400 m range, the wireless doorbell ensures you will never miss any visitor, even if you are a few rooms away or on another floor; the doorbell kit includes 2 plug-in receivers and 1 transmitter, and the transmitter will not interfere with other appliances in your home or those of your neighbors
【WEATHERPROOF & DURABLE】: Ultra-low power consumption; uses CR2032 lithium battery that boasts 3-year maximum lifespan; IP55 dustproof and waterproof rating; works between -20 °C-60 °C (-4 °F-140 °F); withstands various harsh weather conditions
【52 MELODIOUS CHIMES】: 40 mm stereo speaker delivers rich and crisp sound; 5 adjustable volume levels with a maximum volume of 115 dB; press Next or Previous button to easily choose from 52 melodies and you will enjoy pleasant melodies whenever someone rings at your door
【MEMORY FUNCTION】: Preserves your last set melody and volume level after a power outage; no need to reset to your previous settings; convenient and easy to use design for a better user experience
【EASY TO SET UP】: Simply plug the receiver into a power outlet and attach the transmitter to the exterior wall with the provided screws or adhesive patch. This Includes 2 screws, 2 anchor plugs, 1 key and 1 adhesive patch for easy installation of transmitter