Key benefits Real time bite detection and transmission: when a fish touches the bait, the hook position changes and the movement is transmitted to the float immediately through the fishing line. Depth control and depth indication: the bobber helps keep the bait at desired depths and shows the water depth, helping you fish at the right level. Easy to use: press the button and tie the fishing line to the hook for quick setup and operation. Clear bait position visibility: the float communicates the bait position at a glance, reducing guesswork during fishing. Size options Diameter 0.75 inch; Height 21.5 mm (0.85 inch) Diameter 1 inch; Height 27.5 mm (1.08 inch) Diameter 1.5 inch; Height 42.5 mm (1.67 inch) Diameter 2 inch; Height 55 mm (2.17 inch) What you get Packing List: 20 x Fishing Bobber How to use Press the button and tie the fishing line to the hook to activate the bobber. Applications Bite transmission and bait position indication: the device communicates when a fish touches the bait and shows where the bait is in the water. Depth control: you can set the bait hook to stay at different depths at will, and the device shows the water depth. Use scenarios Still water fishing in ponds or lakes: use the smaller diameter options to keep bait at specific depths and quickly detect bites. River or stream fishing: adjust the bobber size to match current depth and flow, while monitoring bite activity. Deep water or variable depth conditions: large diameter options help you maintain the desired depth and read the depth of the water for planning casts.