The unit can be mains powered with batteries or rechargeable batteries. The sound is adjustable and correct, can select radios on the website of the brand and then find them in folders on the device. All in a rugged look, the screen stays on mains and off rapidly on batteries, radios multiple selections by criteria in many plays podcast. No DAB stations at home ... Some cuts due to irregularities in my wifi reception. Namely: documentation provided in English only. Overall the product is well studied.