Material: Aluminum + Silicone Place of Origin: Zhejiang Product weight: 38g, packaging size 19.5*7cm Charging mode: Multi-function charging Applicable environment: ENT and dental department examination Continuous lighting time: 3-8 hours Is it waterproof: Daily waterproof Whether focus can be adjusted: No Is it rechargeable: Rechargeable Packing Quantity: PCS Gear slot: 2nd gear Box specifications: outer box dimensions in cm, gross weight in kg This product has a built-in lithium battery and comes with a charging cable. Charging time is approximately 3-6 hours to avoid overcharging Regarding logo printing: Minimum order of 10 items for logo Type of light bulbs and accessories: LED Outdoor Sports: Fishing, Road Trips, Hiking, Camping, Diving Battery specifications: 18650