Feature:1. Applicability: Press the switch to use electrical appliances within 20W in an emergency, such as: mobile phone charging, energy saving lamps, LED lights, stereos, etc.2. Hand Cranked Power Generation: To ensure normal power generation, 13 revolutions per second is enough. The faster the hand cranking, the greater the power generation current. The generated electricity is directly stored in the built in power lithium battery pack, and both forward and reverse hand cranking can generate electricity.3. Safe: Because the built in battery pack has a protection circuit, there is no need to worry about overcharging.4. With Indicator Light: When charging with the charger, you can observe the charging status according to the indicator light on the charger. When the indicator light is red, the charging is in progress, the indicator light turns green, and the charging is completed. In addition, you can also press the switch to check the power.5. Multipurpose: Great for outdoor camping, backcountry survival, hiking, walking and night riding.Specification:Item Type: Hand Crank GeneratorProduct Material: ABS, Aluminum, Stainless SteelOutput Power: 30WPower Generation: 20WOutput Current: 3AEmergency Light: Hand Crank For Half 1 Minute, Lighting For About 1H (Continuous Lighting For 24H Under Normal Power)Battery: Polymer Li Battery 6600mAh (Included)Product Size: Approx. 23.5 x 12 x 8cm / 9.3 x 4.7 x 3.1inWeight: Approx.1654g / 58.3oz.Package List:1 x Generator1 x User Manual1 x Hand Rocker1 x SupplyNote:When the emergency power supply is not used for a long time, charge it once every six months to ensure that the built in battery does not lose power.Matters needing attention: Do not use household appliances over 20W, do not short circuit the charging port, please use the original charger to charge, there are high voltage points in this product, please do not disassemble it to ensure safety, and do not put it into water or fire.