1、Made of high quality ABS material, sturdy, durable and long service life. 2、Excellent impact resistance, heat resistance, chemical resistance 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 signal 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 protection. Features: 1. Made of high quality ABS material, sturdy, durable and long service life. 2. Excellent impact resistance, heat resistance, chemical resistance 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 signal 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 protection. 6. It is a good fishing rod accessory, will enable you not to miss a bite and makes your fishing easier. Specifications: Condition: 100% Brand New Item Type: Fishing Bite Alarm Material: ABS Color: Black Receiver Battery: AAA Battery(Not Included) Launcher Battery: 9V 6F22 Battery(Not Included) Launcher Size: Approx. 13.5*5.3cm/5.31*2.09inch Receiver Size: Approx. 11.2*5.8cm/4.41*2.28inch Package List: 4 * Launcher 1 * Receiver 1 * Manual