manual crank generator is for emergency at outdoors, provide for your phone, computer, bank, etc. It is a good helper for your travel of outdoors. Features: Manual crank generator, a nice helper under emergent circumstance. Energy saving, environmental friendly, and it is with many interface type. Multi-function, can charge for cellphone, USB nightlight, USB fan, bank. Metal outer case more tough, anti-slip foot pad more stable, vintage bearing, effortless and time-saving. Small and exquisite, convenient to assembly, easy to carry, and not with internal storage function. Practical, suitable for being used in field, field operations, field trips, rescue operations, natural disasters, survival training, emergency communications, long-term shortage, tourism, etc. Specifications: Model: F20 Material: Metal Color: Blue Max : 20W Rotating Speed: 2000rmp/min Voltage/Current: 15V/1.3A Output Voltage: Max 28V Item Size: 19.5 * 17 * 8cm / 7.68 * 6.69 * 3.15in Package Weight: 820g / 28.92oz Note: faster rocking, higher of and voltage. Shake generator output voltage be bigger than setting voltage to regulate output voltage. Please adjust voltage to 5V before you use USB interface. crank generator can charge for Android phone. charging time mainly depends on battery capacity of phone. If battery capacity of mobile phone is 2000mAh, it would take about 4 hours to fully charge. Mainly charge for portable instruments such as low- communication station, interphone, notebook computer, PDA, mobile phone, camcorder, digital camera, CD, MP4, MP3, portable mobile TV, DVD, radio, flashlight lighting, all kinds of lamps, tools, automobiles and various types of measuring instruments. Can charge directly for battery, nickel-metal hydride battery, -acid battery and other types of batteries. Package List: 1 * Crank Generator Manual crank generator, a nice helper under emergent circumstance.;Energy saving, environmental friendly, and it is with many interface type.;Multi-function, can charge for cellphone, USB nightlight, USB fan, bank.;Metal outer case more tough, anti-slip foot pad more stable, vintage bearing, effortless and time-saving.;Small and exquisite, convenient to assembly, easy to carry, and not with internal storage function.;Practical, suitable for being used in field, field operations, field trips, rescue operations, natural disasters, survival training, emergency communications, long-term shortage, tourism, etc.