[Power]: Use 3 AAA batteries as the driving power (battery not included) [Switch mode]: Tail button switch [Lighting time]: 6-8 hours Working voltage: 4.5V Application fields: 1) Medical devices 2) Disinfection and sterilization 3) Ink curing 4) Detection of metal cracks and cracks 5) Photocatalyst light source, 6) Banknote checking and counting equipment, 7) Anti-counterfeiting industry, 8) Medical measurement and biometric detection 9) Hydraulic leak detection. 10) Take amber photos, catch scorpions, check tickets. 11) Nail art and more. Delivery Quantity: 2pcs, Size: barrel length 87mm, head diameter 26mm, tail diameter 26mm Color: black+red Kind tips 1. Package content: only the above package content, excluding other products. 2. The size is measured manually, please allow 1-2 cm measurement error. 3. Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture. Products from BAZHOU's store