What"s in the Package The door chime kit comes with: 1 x Receiver 1 x Transmitter 1 x 3 volts CR2032 battery for transmitter 3 x Wall Plugs 3 x Screws 1 x Instruction Manual Functions Instruction 1.Door Chime Operation Press the push button on the Transmitter unit once, it sends a wireless signal to the Receiver which will sound. The sound will stop as soon as the melody ends. For repeat sound, press the button again.Hold the button in will NOT repeat the sound. 2.Melody Selection Press the melody selector to change different melody. 3.Volume Adjustment Press the volume button to adjust the sound volume to be high, medium and low. 4.Auto-learning Code Button There is an auto-learning code button on the back side of the Receiver. If user wants an additional Transmitter to work with the Receiver, he or she needs to press the auto-learning code button once and the Transmitter can work with the Receiver.(Please see detailed operation Auto-learning Code Set Up in the manual) Specification A. Transmitter unit Power: 1 x 3volts CR2032 battery(included) B. Receiver unit Power: 2 x 1.5 volts AA alkaline batteries(not included) Operating Temperature: -30¡ãC to +40¡ãC Operating Distance: 60meters in the open field(197ft approx.-in open field and suitable conditions) Selectable Tone: Total 36 melodies available Digital Code Type: Auto-learning