SECRUI Wireless Doorbell, 2 Plug in Receiver 2 Bell Push Waterproof Battery Operated Cordless Doorbell Operating at 1,000 Feet Long Range Chimes Volume Adjustable Easy Install for Home, School, Office 2 receivers + 2 push

Ultra-Long Distance Wireless Range-This wireless doorbells boasts a remote connection of up to 300 M/1000 foot and does not interfere with other equipment in your home.
52 Loud Chimes-The Plug in doorbell receiver bell has features 52 tunes and 5 adjustable volume levels ranging from 0 to 120 dB. It will remember your settings even if power outage.
LED Indicator-The 7 color LED light indicator on the plug in receiver flashes when the transmitter is pressed and a signal is received. They alerts those with impaired hearing or when the doorbell sound is (temporarily) unwanted. Mute the wireless waterproof doorbell if a ringtone is not desired and get notified visually by the LED instead when someone shows up at the door.
Weaterproof & Durable-Ultra-low power consumption and CR2032 lithium battery gives a lifespan of up to 3 years; no need to worry about frequent battery replacement; IP55 waterproof rating to withstand the harshest weather (-4 °F to 140 °F).
Easy to Install and SET-Simply plug the receiver into a power outlet and attach the transmitter to the exterior wall with the provided screws or adhesive patch; there is no need to reset tune and volume level after a power outage. Up to 20 additional same model receivers and push buttons can be paired.