NOTE: The battery operated doorbell kits only pair with our battery operated doorbell kits (Model number: BA 11 or WA 11), and they do not match other kits or accessories in our store. CONVENIENT BATTERY POWERED RECEIVER: This battery operated doorbell is powered by 3 AAA batteries (included) so no electric outlet needs to be occupied simply screw the mounting bracket onto the wall and then hook the receiver on 1000 FT or 300 M ULTRA LONG WIRELESS RANGE: Will not interfere with other equipment in your home or those of your neighbors ensures you will never miss a visitor, even if you are a few rooms away or on another floor 52 CHIMES TO CHOOSE FROM: 29 mm stereo speaker delivers rich and crisp sound 5 adjustable volume levels with a maximum setting of 120 dB press Next or Previous button to easily choose from 52 melodies HIGH PERFORMANCE TRANSMITTER: Ultra low power consumption uses CR2032 lithium battery that boasts 3 year maximum lifespan IP55 dustproof and waterproof rating works between 4 F to 140 F withstands various harsh weather conditions MEMORY FUNCTION: Remembers your last melody and volume level after the battery replacement no need to reset to your previous settings convenient and easy to use design for an enhanced user experience