1. The lamp body is made of high-strength aluminum alloy, which effectively protects the internal circuit and can still work normally even under compression or impact 2. The internal wiring adopts an efficient boost circuit to prevent overcharging, over discharging, and power outage protection, maximizing the utilization of the battery 3. It has good waterproof properties and can be used for jade identification or is suitable for most indoor (such as home maintenance) and outdoor activities, such as camping, fishing, hiking, night cycling, map reading, sailing, cave exploration, and hunting 4. Headband with three light sources to meet different jewelry recognition needs. 5. High power LED has a lifespan of up to 100000 hours, avoiding bulb replacement Paired with small lamp holders, it can better observe small objects Power supply method: 18650 lithium battery (included) Light emitting element: white light/yellow light/365NM ultraviolet light/395NM ultraviolet light Gear setting: Three light sources: Three gears [white light, yellow light, light] Head diameter: 18mm length: 13.5cm Color:A:Blue Material: aluminum alloy Package Contents: 1 * Jade Detector Lamp 1 * USB Cable 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.