【150m/490ft Wireless Range】A penetrating and strong signal helps you never miss the arrival of a visitor, even if you are in other rooms or other floors of your house. Wireless doorbell chime kit for homes, classrooms, offices, apartments, schools, villas, hotels, factories, hospitals, etc. 【32 Chimes & 4 Volume Levels】: It has 4 adjustable volume levels, the maximum intensity is 100dB and the minimum is 50dB (mute), which can be adjusted at any time according to the situation. There are 39 different ringtones to choose from, including a variety of classic ringtones. Provides you with rich and clear sound. A host can be equipped with multiple doorbell buttons, each doorbell button. 【IP44 Waterproof & Weatherproof】The wireless doorbell is built to last with its IP44 waterproof and weatherproof construction. This doorbell works in temperatures ranging from 14℉/-10℃ to 131℉/55℃ and withstands various bad conditions. Don't worry about rain, snow, or extreme temperatures - your waterproof outdoor wireless doorbell will keep ringing! 【LED Indicator with Mute Mode】Don't want to be disturbed during a meeting or an afternoon nap? Perfect for those who need peace and quiet or have sleeping children. The built-in memory chip remembers the last setting without the need to reset it after a power outage. 【Easy Installation & Energy Saving】: Simply plug the receiver into an outlet, attach the transmitter to the wall or door frame with adhesive tape. The transmitter battery can be used for more than 2 years. MEMORY FUNCTION: Without the need to reset the previous settings after a power outage, it will remember your last selection.