General description This wireless doorbell is self-powered and requires no batteries or cables, making it an environmentally friendly and cost-effective solution. When the transmitter is pressed, it generates its own electric current and sends a stable signal to the receiver, eliminating the hassle of changing batteries and preventing damage to walls or the doorbell itself. Technical specifications Range: Up to 152m (500ft) with obstacles, up to 305m (1000ft) in open areas Ringtones: 38 different options Volume levels: 4 levels including mute Installation Installation is straightforward: simply connect the mini receiver to an outlet and attach the transmitter to a wall using the included accessories, which consist of 2 screws and a piece of adhesive tape. Usage This wireless doorbell is suitable for various settings including homes, apartments, schools, country houses, and offices. It also features a memory function that retains your last settings after a power outage. Other