1. Lightweight and portable, bright and durable 2. Multiple waterproof ring protection, waterproof 91 meters underwater, can be used repeatedly 3. Comes with plastic hooks, which can be installed on diving equipment such as elephant pull and BCD at will 4. Depth limit: 300 feet (91 meters) 5. Life time: 50 hours 6. Power supply: built-in 3 x LR44 button batteries 7. Instructions for use: After installing the battery and tightening it, it will light up. 8. Packing list: LED light stick + 3 LR44 button batteries 9. Size: 11.5x1.6cm 10. Weight: 57g