Features: 1. High strength aluminum magnesium alloy material, precision machined, tough and not easily deformed 2. Small and portable, easy to use, easy to grasp, easy to operate, and comfortable to grip 3. The internal wiring adopts an efficient boost circuit to prevent overcharging, over discharging, and power outage protection, maximizing the utilization of the battery 4. Headband with multiple light sources to meet different jewelry recognition needs 5. It has good waterproof performance 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 riding, map reading, sailing, cave exploration, and hunting Parameters: Color: Blue Material: Aluminum alloy Light source: three light sources/four light sources Product specifications: caliber 16mm, length 133mm Gear: White light version: strong/weak light two level dimming Three light source models: white light+yellow light+purple 395/purple 365 three level dimming Four light source model: white light+yellow light+purple 395+purple 365 four level dimming Power supply method: One lithium battery * 1 (including) Charging method: seat charging Tail rope: 4mm small diameter+8mm small diameter Product List: Flashlight * 1 Charger * 1 Rechargeable lithium battery * 1 Small caliber 4mm * 1 Small caliber 8mm * 1