【👍Easy to Use and 365-day Warranty】The wireless doorbell has been paired and can be installed in one minute. Plug the receiver into the socket, and you are ready to use. As long as the door bells of our brand no matter what size, what color, you can use their receiver and transmitter interchangeably together, and more importantly, they don't need to be re-paired. We provide 365-day satisfaction purchase guarantee.
【👍300M/1000ft Long Wireless Rang】The wireless classroom doorbell has super remote control, penetrating power, signal stability and strong anti-interference features, will not interfere with or be interfered with other devices in your home or neighborhood. It is suitable for classroom, kids room, bedroom, home, office and apartment.
【👍IP66 Waterproof and Dustproof】The doorbell ringer with the highest waterproof rating on the market at present, the dustproof and waterproof rating is IP66(operating temperature between -4°F and 140°F), which can work in severe weather such as heavy rain, snowstorms or dust storms.
【👍66 Chimes to Choose and Mute Mode】The loud wireless doorbells not only have 66 unique melodies and 7 adjustable volume levels(0dB to 115dB) to meet your needs for different occasions, but also has a mute mode so that you don't have to worry about the doorbell disturbing your sleeping baby. Even in mute mode, the receiver LED light still flashes and you will never miss a visitor.
【👍Memory Function】The door bell will remember all your settings when the power is off, when you plug it again, the memory function will restore the sound and volume of the last time you used it, and there is no need to select the sound and volume again

Classroom Doorbell Wireless Doorbell IP66 Waterproof 1000 Feet 66 Chimes 115dB 7-Level Vol Mute Mode Loud Battery Doorbells Chime for Office Classroom Home Kids Room Teachers & Hearing-Impaired