Specification: Product size: 7*6.7cm Main material: ABS Feature: 1. The sound of alarm and LED indicator is very loud, which can be detected even 50 meters away. It also has a very high-quality LED indicator 2. It is portable and easy to install. Just clip the alarm on the hook, wrap the fishing line around the alarm, and finally press the power switch button in front. When a fish is hooked, it will sound. Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 2. Please allow 1-2cm measuring deviation due to manual