Long range and strong signal: radio range up to 300m and 58 different signal tones, including many familiar melodies. Signal can pass through obstacles. This doorbell can be used in apartments, villas, offices, offices or the garden. Different sounds and volume - with a selector switch on each door to choose your individual favorite tone, consisting of 58 different wonderful melodies. In addition, the doorbell is equipped with 4 adjustable volume levels to meet different requirements. Watertight and weatherproof: thanks to IP44 weatherproof technology and an operating temperature ranging from -30 C to 70 C C the radio bell is suitable for outdoor use. The radio bell is resistant to harsh weather conditions. Easy installation: just plug the mini bell into a socket and install the transmitter with the included screws or adhesive tape on the wall or door frame. Either you cook in the kitchen or in the hunting garden, this wireless radio bell informs you at the right time. Never miss a visitor Color: Black Size: bell 20 * 48 * 78mm, receiver 76 * 24 * 80mm Quantity: 1 piece Noted. 1. Different monitors and line levels are different, actual color may be different from the picture. 2. Any manual measurement may be biased.