Because the fish has phototaxis, when the light is near the hook, the fish will come over to see the bait and easy to be hooked up. With water-triggered design, it can be lighten by being put into water (continuous flashing). Can be used for underwater 1000 meters / 3280.84ft, being hung on fish net or tied around the bait to attract fish. Can also be placed in the cage of shrimp or crab to attract small fish and shrimp. It will be dry after being picked up and wiped, can be used for more than 200 hours. Item Name: Light Bait Shell Material: Acrylic Features: Diamond Shape, LED Lighting, Fishing Tool Size(Bottom Dia. x Height): 2.5cm x 4cm/0.98" x 1.57" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Light Bait