I use the small FiiO with my Galaxy S3. An appropriate USB adapter must be bought separately. Or I use it to connect my netbook on my music system. In both cases, I was impressed by the sound. Clean and well-balanced. The scope of supply is large, bag, standard USB adapter (please note again - it needs a USB OTG cable in addition), protective cover and two rubber bands to FiiO and smartphone connect to. A few more notes: - It can be switched on and exhibit at FiiO USB charging. Does not you take it out, the battery is quickly sucked empty the smartphone. - Toll: The DAC has two audio jacks for two headphones - but very stiff. You have to press a little. I did not notice for a long time and thought it would be a bad connection. The opposite is the case, - It uses the best smartphone the easiest player and leaves it there by default. Equalizer settings should not make the smartphone you. Neutron and Poweramp are rather unsuitable, because the sound is very manipulated on the smartphone. The results are then distorted when using the DAC. I am very pleased to now nearly a month use time .... but flirtatious already with the E18 comes on the market in July / August. The price / performance ratio is 100%.