Feature: 1. Eco-friendly COB lamp beads, long life and high brightness with energy efficiency. 2. Come with high quality lanyard on the bottom for easy hanging and carry. 3. Built-in mini rechargeable battery with USB charging cable to provide continuous illumination. 4. Compazt size, easy to carry. 5. Mini flashlight LED work light with high brightness, suitable for cycling, hiking, camping and other outdoor activities. Specification: Material: Aluminium Alloy Battery: Built-in Rechargeable Battery Power Supply: USB Charging Length: 10cm/3.93inch (Approx.) Lamp Holder Diameter: 4.2cm/1.65inch(Approx.) Tail Cover Diameter: 2cm/0.78inch (Approx.) Package List: 1*Box 1*USB Cable 1*Mini Flashlight Note: 1. The battery shall have the positive pole facing inward (the other side of the lamp cap) and the negative pole facing outward (the tail). 2. Switch in the tail, light switch is the dimming function. 3. Do not overvoltage use, the voltage should not exceed 4.2v (the battery is root forward, do not reverse, otherwise the plate will burn) 4. The first charge lasts for at least 6 hours, and then it will be ok if the green light turns on according to the charger. No need to overcharge. 5. If the battery is not used for a long time, the battery should be fully stored and recharged and discharged in about three months.