Wireless Doorbell for Home Waterproof Door Chime Kit Operating at 1300-ft 58 Adjustable Melodies & 5 Volume Levels -PHYSEN Door Bell Wireless with LED Strobe 2 Push Buttons + 4 Plug in Receivers

Package Includes: 4 receivers+2 waterproof push buttons+screws+double-side tapes+batteries+mini user manual Set the receiver for separate tone operation(pairing instruction): 1)Plug receiver into outlet and select desired ring tone by short press receiver MUSIC button; 2)Then long press receiver VOLUME Control button for about 5-7 seconds until you can hear receiver ""ding"" with the blue light will be flashed(which mean receiver get into pairing mode) and please notice that receiver will exit the pairing mode automatically if it doesn’t get signal from transmitter/sensor in 5 seconds. 3)so you should immediately press transmitter pair with the receiver and you will hear the tone you selected which mean your operation is successful. 4)Press the transmitter to have a final check about the pairing works if you can hear the tune you selected again which means that your operation is completed successfully. If you want to set the receiver play a diff