Description: 1. Compatibility-The stereo mini jack connection allows you to enjoy high quality audio from a variety of devices it's the best choice for iPod. 2. Digital Amplifier Technology provides you HI-FI sound effect. 3. Digital amplifier technology provides clear. And more powerful sound while extending battery life. 4. Special iPod player jack. It can use 5v/12v transformer which compatible with IPOD player. It is also can be recharging while transmitting date with computer. 5. The iPod player can be controlled within 8 meters. Turn on /off. Volume +/-. Pause / play. Forward / backward. All this functions can be achieved within 8 meters. 6. Dimensions: Length205mm*Width115mm*Height30mm