Features: High-tech accurate detection, when the fish bites the hook, it flashes a red light prompt, and does not let any chance of catching fish Ultra-high brightness display with a viewing distance of 100 meters High-brightness LED red light positioning display, will not be tired when staring at the eyes for a long time Variety of styles, suitable for a variety of fishing methods Ultra-long green standby time, single flash standby time can reach more than 1000 hours, three flashes can reach more than 300 hours Self-contained waterproof lock switch does not need to remove the battery Specifications Type: flash, constantly bright Color: white Material:plastic Size: about 29.6 x 23.5 x 17.9 mm Battery: 1pc button cell battery(built in) Package Include 4pcs x alert light Note: Please allow 0-1 cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Welcome to our store , hope you have a pleasant shopping experience