•Please use the good quality alkaline battery for the doorbells. Don't use the bad quality heavy duty battery. •Don't install this product in the sunny or rainy place
•Please keep some distance between this product and the metal when you install in case it affects the remote distance.
•The doorbell receiver has two player mode of music choice and music circulation. •Music setting: Light press the selection button to choice the music which you like.
•Music circulation setting: Long press the selection key for three seconds when you hear the ticking, the doorbell had inter the music circulation state.At this time Press the transmitter one time the music will change to another one.(In the circulation mode,light press selection button will return to the music choice mode).
•Sound volume adjustment: when press(or push) the "sound volume control" key,the volume will change, has three level volume for selection.