General description This multifunctional wireless doorbell ensures you never miss a visitor, featuring a sleek design that won't occupy your socket interface. It is ideal for various settings including homes, offices, hotels, and more. Technical specifications Transmission distance: up to 300m in open areas Operating temperature: -22°F to 158°F Volume levels: 5 adjustable levels from 0dB to 100dB Melodies: 60 built-in ringtones Material: high-quality ABS Installation Plug the receiver into a wall socket Use the included bracelet to attach the battery transmitter to the outside wall Simple installation process, manageable by a single person Usage Press the transmitter to ring the doorbell Blue light flashes when the button is pressed, aiding the hearing impaired Remembers last melody and volume after a power outage Other information Package contents: 1 receiver, 1 transmitter, 1 instruction manual, 1 3M double-sided tape, 1 battery, 2 screws