Product DescriptionBuilt-in 900mAh lithium polymer battery, greatly improving the battery life.Note: It is better to fully charge the battery and check if the headlight can work normally when you receive your new headlight. The battery can only be charged with an output power not exceeding 5V. Depending on the voltage, the charging speed will be different.HOW TO CHARGEStep 1: Open the lock of the USB charging protection cover on the top of the light.Step 2: Insert the USB cable into the charging port of the headlamp.Step 3: The charging status is indicated by four blue lights under the spotlights.Battery Indicator:1 light on - 25%2 lights on - 50%3 lights on - 75%4 lights on - 100%Warm Light for Better Night VisionWarm light functions make it the safe and necessary for repairing, running, reading, walking, camping, climbing, exploring, fishing or surviving at night.Small and PortableThis compact LED rechargeable headlamp is ultra-lightweight at only 63g, which will not add any burden to you.Waterproof and lightweight, perfect for adults and Wider Vision DesignHands-free, elastic and adjustable strap for comfortable wearing. Comfortable adjustable headband, 0-60 freely adjustable clamping angle, the scope is wider and more convenient to use.Comfortable adjustable headband