This lightweight dual amplifier has been specifically designed to improve the overall sound quality and volume of portable music players such as MP3 players, smartphones, tablets etc. It features a built in bass booster that adds extra power and depth to your audio. You can enjoy up to 12 hours of continuous playback thanks to an intelligent power switch that conserves charge by turning off the amp when no audio signal is detected. Output is also amplified 120% meaning your device doesn\'t need to use as much power to play audio and you can drive larger, more powerful headphones. A second 3.5mm stereo port also means you can easily share your audio by plugging in an additional set of headphones. The compact form factor - comparable in size to the 6th generation iPod nano - also has an integrated cable management design allowing you to conveniently store your headphone cable when not in use. Note: 2 hours charging gives a full battery and 12 hours playback, 30 minutes gives a fast charge with 4 hours playback (approx.) Package Contents Mini Headphone Amp & Splitter 1 x 15cm 3.5mm audio cable 2 x 23cm USB 2.0 Type A to Micro-B charging cable