Tank Light - Water Activated Marker
- Lights turn on when they come in contact with water and turn off when they are dry.
- Flashing mode only.
- Ideal for dawn, dusk and night dives - make divers easy to spot under water and are reusable unlike glow sticks
- Helps you keep track of your buddy under water
- Batteries are non-replaceable. Light lasts 500 hours under water.