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 -20C to 60C. 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.