Power bank function, when the phone is out of power, it acts as a mobile power source to charge the phone. Rainproof and not afraid of humidity, solar photovoltaic panels are waterproofed Front fan switch green button Press the short key to turn on the fan. Each short press increases the wind force by one level. Press the 5th time, the fan stops rotating Red button for the switch of the rear fan (the same button as the LED light) Press the short button to turn on the fan, and each short press increases the wind power by one level. Press the 5th time, the fan stops rotating LED light switch Long press the red button and the LED light turns on, and long press again to turn it into a blinking state. Long press for the third time to turn off the LED light Product parameters: Product name: Solar safety helmet Product material: ABS Configuration: three 1W lamp beads Wind speed: 4-speed adjustment Polycrystalline solar panels use: sub-layer panels (sunproof and waterproof) Battery capacity: 9000mA dual fan Equipped with: compass, hygrometer °C, thermometer °C, solar charging, dual fans Precautions for use: 1. When wearing a helmet, you must adjust the headband according to the size of the head and fasten the chin strap. 2. The helmet must be replaced even if there is no obvious damage after being severely impacted. Product List: Helmet*1