YSTD&reg; Dynamo Hand Crank Generator USB Cellphone Emergency Charger For PDA Nokia, Motorola, Samsung, Sony Ericsson, Dopod MP3 and MP4 The Battery charging time: 1 Minutes Maximum output current: 300 mA Maximum output voltage: DC 6V This product suit for Nokia, Motorola, Samsung, Sony Ericsson, Dopod MP3 and MP4 Talking time:3-5 Minutes Item size: 57*45*30mm