Doorbell ButtonThe transmitter is for raindrops, which ensures performance in the outdoor environment. The doorbell could work between -30 °F to +65 °F withstand any weather conditions 60 Tunes The Plugin doorbell receiver bell has featured 60 tunes and 5 adjustable volume levels ranging from 0 to 85 dB. It will remember your even if power outages. Suitable for families, offices, hotels, factories, etc. In addition, the product is covering your home or business in an open space, this doorbell ensures that you will never miss any visitors. Wireless Long Range Long operation range is up to 300 meters / 1000-ft in the open area, the strong and stable wireless signal ensures that you can hear the doorbell chime clearly, even if you are a few rooms away or on another floor. Ideal for large homes, flats, schools or offices, the strong and stable signal ensures you can hear the alert from anywhere, even in the garden, basement or upper floors, so you’ll never miss a visit from family, guests or the postman again, Manufacturer: GFJryET