Model Number: HS-678A FEATURES 1. Aluminium speaker, delivery high quality sound 2. Ultra portable,battery operated mini stereo system for your ipod 3. On/off switch for you to save your battery life while not in use. 4. Work with ipod , ipod mini, shuffle , nano, video , MP3 player, notebook and any audio player with a 3.5mm jack. 5. 4 AAA batteries last up to 8 hours playback. 6. Volume control SPECIFICATION power supply DC 6 Volt ( AAA batteries * 4 ) Or AC adaptor ( 6V, 400mA) output powr 1 w + 1w speaker 50mm speaker , 4ohms signal cable 20cm STR cord input inerface stereo 3.5mm silver-plated L type