NÖRDIC portable Hifi headphone amplifier

Compact headphone amplifier to improve volume on mobile phone, MP3 players, DVDs, laptops M.Minbugd Lithium batteries to play up to 6 hours. Input: 3.5mm Auxoutput: 3.5mm Auxled indicator showing status power on, battery charge and weak battery recharge of The battery is done with the supplied USB cable.stereo cable of about 70cm included impetary: 16-300OHMBATTERY: 3.7V 1000mAh measure: 103x54x13vikt: 85G material: Metal