1byone Easy Chime Wireless Doorbell Door Chime, Nice and Luxurious Modern Digital Doorbell, MP3 Player Function with SD Card Slot, Made of Superior Material, Very Loud Tone and Adjustable Volume, 36 Built-in Beautiful Songs or Load Your Own Sweet Songs with SD Card, Color Black

What's in the Package
The door chime kit comes with:
1 x Receiver
1 x Transmitter
1 x CD
1 x 3 volts CR2032 battery for transmitter
1 x Data Line
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.
2.Melody Selection
Move the band switch to IN position at the side of the receiver and display the built-in melodies.
Press button to choose different melodies for 16 polyphonic melodies.
Move the band switch to SD position at the side of the receiver and display the melodies you download from the computer.
Time for displaying melodies is only 15 seconds. Also, two buttons for the music selection.
3.Volume Adjustment
Keep pressing PLAY button to enter into music display status. Then you press + button to increase the volume and - button to decrease.
4.Download music to the SD card
5.Music Cutting
This door chime kit is equipped with music cutting software, stored in the CD.
6.Nameplate
There is a nameplate position on the Transmitter.

Specification
A. Transmitter unit
Power: 1 x 3volts CR2032 battery(included)
B. Receiver unit
Power: 3 x 1.5 volts AA alkaline batteries(not included) or DC 5V external adapter power supply(not included)
Operating Temperature: -30¡£C to +40¡£C
Operating Distance: 100meters in the open field(328ft approx.-in open field and suitable conditions)
Selectable Tone: 16 Built-in melodies and melodies in the SD Card.
Digital Code Type: Auto-learning