Description: Material and Size: The Fishing Alarm Set is made of PP material. The inductor measures 5.5cmx11cm/2.17inchx4.33inch, and the receiver measures 5cmx10cm/1.97inchx3.94inch.Use: When fishes comes to your fishing hook, it will give a signal and super sensitive.Functional Features:Digital Fishing Alarms Set includes a fishing hook alarm function,a bite alarm with adjustable volume, tone, and sensitivity.Receiver Features: The receiver has adjustable volume settings and multi modes for your convenience. It also features a night light that can be turned on/off using button W.Waterproof and Long Range: Fishing Tool Set is waterproof and has a working range of over 150 meters. Specification: Material: PP Size Chart: Receiver:5.5cmx11cm/2.17inchx4.33inchInductor:5cmx10cm/1.97inchx3.94inch Package Includes: 1 Receiver and 2 Inductors Note: Please allow slightly errors 1-2cm differences due to manual measurement.