Features: The electricity generated is stored directly in the built-in power lithium battery pack, allowing for both forward and reverse hand cranking to generate electricity effectively. The built-in battery pack includes a protection circuit, eliminating concerns of overcharging. The output current reaches 3A, and the included polymer lithium battery has a capacity of 6600mAh. The compact product size of approximately 23.5 x 12 x 8cm makes it easy to carry and store. Specifications: Name: Hand Crank Generator Product Material: ABS, Aluminum, Stainless Steel Voltage: DC 220V, DC 12V, USB 5V Output Power: 30W Power Generation: 20W Output Current: 3A Emergency Light: Hand Crank For Half 1 Minute, Lighting For About 1H (Continuous Lighting For 24H Under Normal Power) Battery: Polymer Lithium Battery 6600mAh (Included) Product Size: Approx. 23.5 x 12 x 8cm / 9.3 x 4.7 x 3.1in Weight: Approx.1654g / 58.3oz 220V usage range: mobile phone chargers, energy-saving lamps, wireless routers, some LED lights, various low-power electrical appliances (inductive appliances cannot be used) Package List: 1 x Generator 1 x User Manual 1 x Hand Rocker Packing list: 1 * Automatic induction shoe polishing machine Note: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. Notes: Please allow 0.5cm/0.20in error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item, hope you can understand. If You Have Any Questi