Portable mp3 player series technaxx musicman max memory expansion 32 gb memory expansion microsd audio formats mp3 wma battery life audio 7 h recharge time 2 h power supplies internal battery rechargeable polymer lithium battery connections headphone 35mm jack usb 20 microsd slot function plugplay colour blue dimensions 2 1 x 2 1 x 2 1 mm weight 10 g