Features: Make from Engineering Plastic, this alarm tool is both fashion and Enduring. Being able to remind fisherman of fish bites and avoid missing any good opportunities. Adopting electronic buffer designs, it can accurately sense the action of the fish's bites hook and provide alarm prompts through sound and light. Unique designs to effectively protect fishing line and conveniently clip on your rod. will not damage your fishing line, or any part of the fishing rod. Suitable for various fishing condition, including lake, river, ocean. Whether fishing during day or night, it can accurately remind you of a fish bites, making it easily to catches more fishes. Portable and easily installed. Each alarm power by 3pcs button cell(not included). Specifications: Materials: Engineering Plastic Color: Black/Red Color/Green/Yellow/Blue Size: about 55x50x15mm/2.17x1.97x0.59inch Package Includes: 1pc Fishing Bites Alarm note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.