Gear: Three gears (low 30%-medium 60%-high 100%) Input voltage: 3-4.5V (One 3C power battery, some batteries have insufficient power and cannot start.) Output power: 5-10W Charging port: Type C Charging current: around 1A; Diameter: 20.5mm;Charger: Suitable for most chargers on the market (fast charging, slow charging are both acceptable, regardless of model) ;Application scope: Flashlights, small fans, mobile desk lamps, micro polishing machines, etc., widely used. Color: Green Material: plastic Package Contents: 5 pcs Flashlight Driver Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.