? This product uses a speed of 60 rpm, lower than the human breathing rhythm, easy to shake and produce high power. ? Product function: When the flashlight is generated, the output indicator light is on, and the product configuration of the front and negative power display devices can directly check the storage voltage and power. ?The handle of the product is made of aluminum alloy, which can be folded and never rust. ?Input port and output port are international standard specifications, easy to maintain ? Travel emergency power supply, mobile phone charging, laptop charging, 150W electrical appliances, car charging source, base station emergency power supply, outdoor small electric drill.