SURFOU Wireless Doorbell,Waterproof Doorbell Operating at 1300Ft with 55 Melodies 5 Volume Levels LED Flash Mute Mode Memory Function Wireless Doorbells for Home Classroom,2 Buttons 1 Receiver

Easy-to-Use Doorbell: Simply insert the receivers into the sockets and attach the transmitter to the front door with the included double-sided tape or screws and you're ready to use.

Weaterproof and Durable: Ultra-low power consumption and 12V 23A alkaline battery gives a lifespan of up to 3 years.IP55 waterproof rating to withstand the harshest weather -30 °C to 70 °C (-22 °F to 158 °F).

Ultra Large Range: Wireless doorbell: wireless range up to 1300FT/400m (unhindered area), strong and stable wireless signal ensures that you can hear the wireless doorbell clearly, even if you are several rooms away or are on another floor.

55 Chimes and Memory Function: The ready-to-plug receiver has 55 ringtones (including Christmas song: We wish you a Merry Christmas) and 5 adjustable volumes from silent to 110 dB. The built-in memory chip remembers your last setting without having to reset it after a power failure.

Used for homes, apartments, schools, villas, offices, warehouses, hotels, factories, hospitals, classroom, etc