AVANTEK Wireless Doorbell D-3C, 1300 ft Long Range Door Chime Kit, 52 Melodies, Up to 115dB Volume and LED Flash with 2 Plug-In Receivers & 1 Push Button, Black

• 1300 FT WIRELESS RANGE: 2 plug-in receivers included, the sensing distance can reach up to 1300Ft in unobstructed environment; will not interfere with other equipment in your home or those of your neighbors, ensures that you will never miss any visitors; NOTE: Metal will interfere with the signal and shorten the transmission range. Please place the transmitter in areas away from metal

• HIGH PERFORMANCE TRANSMITTER: Ultra-low power consumption; uses a lithium battery that boasts 3 year maximum lifespan; IP55 dustproof and waterproof; working temperature ranges from -4 °F-140 °F; withstands various harsh weather conditions

• 52 BEAUTIFUL CHIMES: 40 mm stereo speaker delivers rich and crisp sound; press the Next or Previous button to easily choose from 52 melodies; 5 adjustable volume levels, with a maximum volume of 115 dB; 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

• EXPANDABLE DOORBELL SYSTEM: Expand your existing doorbell system with up to 2 transmitters and unlimited receivers, build your own simple alert system, can be paired with AVANTEK CR-1 RB-1 plug-in receivers, CR-2 RB-2 transmitters and AVANTEK plug-in doorbell kits with 1 transmitter