SURFOU Doorbell Easy Installation 1300ft Wireless Range Loud Enough Door Bell with 55 Ringtones 5 Volume Levels Mute Mode LED Flash Doorbells for Home Apartments Businesses Classrooms

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.
Extendable Door Bell System: With up to 64, 000 learning codes, you can add multiple receivers and transmitters of the same model to expand your door bell system. The doorbell is designed to aesthetically fit all types of homes and is also suitable for offices, stores, business and many more.