Feature: 1. 1. Surface cure for crack repair in 60-90 seconds. 2. 2. Verify hidden security features on banknotes and passports. 3. 3. Check paper quality on security documents. 4. 4. Check watermarks and security strips. 5. 5. Lighting function, super bright LED. Highlight alternations and staining. Specification: Name: Glass UV Cure Light Material: Plastic Battery: 4*AA Carbon batteries (NOT included) Size: 16*5.5*2cm / 6.3*2.2*0.8inch Suitable for the following situations: 1. Professional glass repair shop improves work efficiency 2. Repair and cure under no-day conditions, such as at night, indoors, and rainy days. 3. The inner layer of the glass is damaged and needs to be repaired and cured. How to use: 1. Push the switch by hand. For the flashlight, push the switch backwards to the UV lamp. The middle is closed. 2. Open the UV lamp, close to the cured film, about 1-2 minutes to complete the initial curing solution, if the repair solution is too much, you can increase the time as appropriate, subject to actual curing. 3. Pay attention to the battery positive and negative, if the light is dark, that is, change the battery. Package List: 1 x Glass UV Cure Light (Batteries are NOT included) Note: Carbon batteries are recommended since alkaline batteries may damage the board. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Please allow a little difference due to manual measurement.