YABIFE Self-Powered Wireless Doorbell, Cordless Plug in Door Bells, IP44 Waterproof Door Chime Bell, 58 Ringtones, 0-110dB Loud 4 Levels Volume, 500-1000ft Range, No Battery Required

No battery required at all:No longer need to take hassle changing batteries,and the transmitter won't become "dead" anymore like the battery-operated ones 0dB-110dB,4 levels volume:Not only an"extra loud boy", but also a "silent girl".As loud as 110dB,even if you're listening to high volume music, if the doorbell rings, you'll never miss the sound.On the contrary, if you got tired,just set the volume to silence,then you can stay with yourself a whole day without any bell sound Super LED flashes:The doorbell's LED signal has been widened and brightened according to customers' suggestions, making sure the LED flashes can alert you from a long distance Over 500ft Operation Range in Open Space:No matter you're upstairs, in the garden or at the back door, just keep a receiver at a place near you, alert sound will catch your attention successfully IP44 waterproof :Works well in both wet and dry conditions.Piece of cake to install.When visitors press the doorbell button,it lights up,giving them feedback that the doorbell has rung 58 ringtones and 1-year Service:58 updated ringtones to suit your taste,Clear and loud sound,What won't happen is the button will get stuck and either not ring or ring when no one presses it