... : FeaturesBuilt-in battery Built-in rechargeable battery Audio output 3.5MM stereo audio output interface Power outage memory can automatically ... function Speaker output45mm,Within the magnetic,4Ω5W Input powerDC5V,3.5mm port line inPower SupplyBuilt-in polymer rechargeable battery 600mAh3.7V ... to different kinds of device, such as mp3/4, CD, radio, mobile phone, pc1.[ON/OFF]: ON is turn on, OFF ...