Super long receiving distance， environmentally friendly， energy saving <br>With 36 songs for choosing， press the external button "up/down" to finish (music includes Asia， Europe， America famous songs， also has 10 songs of  Arab Music， Concert which the Middle East customers' like) <br>Volume control: 3 levels to choose (high， middle， low)， press the external switch or button to finish <br>Easy to install without having to seek the help from professionals <br><br>Material: Plastic<br>Color: White<br>Receiver: 10 x 2.5 x 6.5 cm (LxWxH) <br>Transmitter: 7.3 x 4 x 2 cm (LxWxH) <br>Receiver button: music selection (36 songs)， volume control (3 levels) <br>Transmitter button: doorbell <br><br>Parameters: <br>1. Working mode: wireless crystal remote control <br>2. Receiver operating voltage: DC 3V， 2 x AA batteries (not included)<br>3. Power: not more than 2W<br>4. Operating frequency: 433.92MHZ <br>5. Remote / receiver distance: not less than 80m (open area)<br>6. Transmitter operating voltage: 12V (battery model: 23A 12V)<br>7. Transmitter working current: not more than 15mA <br>8. LED indicator: Press the transmitter button and the LED indicator turns on， transmitter starts working， the receiver gets commands and sounds out music to remind you that you have a guest. The blue LED of receiver flashes along with the music. <br>1 x Transmitter <br>1 x Receiver <br>1 x Adhesive <br>2 x Screws <br>In blister package<br /><img src="http://img6.eachbuyer.com/x9/p100/eb4060_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4060_5.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4060_6.jpg" />