[Battery Operated Doorbell] This wireless doorbell is powered by 3 AAA batteries (included), requiring no electrical outlet. The receiver can be mounted on the wall using screws or placed on a desk. It is portable and suitable for use in the backyard, basement, garage, or bedroom. [Wireless Doorbell with Touch Button] Features a touch-sensitive button designed for wireless operation. Rated IP44 for dust and water resistance, with high sensitivity and low power consumption, suitable for indoor and outdoor installation. [Flashing Light Doorbell] Offers 36 melodies and 4 volume levels (mute, low, medium, high). Includes a built-in large LED indicator to assist users with hearing impairments. [Long Operating Range up to 1000 ft] Delivers a strong wireless signal with an operating range of up to 1000 feet in open areas, without interfering with other electronic devices in your home or nearby residences. [Easy to Install Doorbell] Simply insert 3 AAA batteries into the receiver and install the transmitter (remove the insulating sheet) on the door frame. Avoid installing near metal surfaces or electronic devices such as televisions.