Item specifics: Power generation 20W Generation voltage 21 V (maximum) USB5V maximum output current 3A AC220V output power 30W Output voltage of the DC socket 521 V Output power of the DC socket 200 W The time to fully charge the internal supercapacitor manually is 5 to 15 seconds When fully charged, the self-contained light has an operating time of 15 minutes AC220V usage range Mobile phone charging, some LED lights, wireless routers, energy-saving lamps within 30W, LED sunlight, incandescent lamps and other low-power electrical appliances (inductive electrical appliances can not be used) Energy storage method supercapacitor Capacity 20F8 strings (equivalent to 800mAh battery power) Product size 220*140*80mm Characteristics: 1. The hand-cranked multi-function portable power supply is a pure green hand-cranked generator. This product does not need to be charged and can generate electricity by hand. The hand-cranked generator can display the real-time power generation voltage and current. It is a real hand-cranked generator. 2. The maximum power generation of the product can reach 20 watts, and the output interface is rich, USB5V, DC12V (varies with the hand crank speed), AC220V, among which the output current of 5V can reach 3A, 12V20A, and AC220V can reach 30W. 3. There is no battery in the hand-cranked generator, and the energy is stored through the supercapacitor. The stored energy is not too high, the internal capacitor can be fully charged by hand cranking for 10-20 seconds, and the built-in light is on continuously for more than 15 minutes. When charging the mobile phone in an emergency, it still needs to generate electricity by hand, and the speed of manual rotation is not less than 60rpm. Check the current value of the power generation current to see the charging effect, the larger the current value displayed, the better the power generation effect and the faster the mobile phone charging speed. Notice: 1. Please allow 1-10mm difference due to manual measurement. 2. Due to the light and screen difference, the item's color may be slightly different.