Made of high quality ABS material, sturdy, and long service life. 2. Excellent impact resistance, heat resistance, chemical and good electrical properties. 3. Adopts KB-PCB double-sided circuit board, portable and easy to install. 4. The sensitive central axle roller can be touched to capture the and send out the beeping sound and light warning. 5. The indicator LED lamp is always bright and clear. Low standby power consumption, energy saving and environmental Features: SOUND LIGHT WARNING - The sensitive central axle roller can be touched to capture the and send out the beeping sound and light warning GOOD PERFORMANCE - Excellent impact resistance, heat resistance, chemical and good electrical properties.Adopts KB-PCB double-sided circuit board, portable and easy to install. WATER - Designed to be water-resistant, which is a necessary characteristic for fishing bite alarm to avoid sudden destroy during fishing POWER SUPPLY -Receiver battery is powered by AAA battery (Not Included); Launcher is powered by 9V F22 battery (Not Included) GOOD FISHING ACCESSORY - The fishing alarm indicator is a good fishing rod accessory, will enable you not to miss a bite and makes your fishing easier Package Includes: 1 Fishing Bite Alarm Listing and template services provided by inkFrog