Wireless remote sense bite alarm kit not only has sound and light alarm while fish bites, but also send signal to over 100 meters away,so you can walk away or have a rest carrying the receiver,not afraid to miss hooked fish. Specification: Model: JY-65-3 / JY-65-4 (optional) Storage Case Size: 25 * 18 * 5.5 cm / 9.8 * 7.1 * 2.2 in Package Size: 27.5 * 19 * 6 cm / 10.8 * 7.5 * 2.4 in Package Weight: approx.409.2 - 464.4 g / 0.9 - 1.0 lb [Transmitter] Model: JY-65-3 / JY-65-4 LED Color: Red #43;Yellow #43;Blue / Red #43;Yellow #43;Blue #43;Green Material: ABS #43; Rubber Battery: 3* LR44 button cell (not included) Size: 7.5 * 3.5 * 3 cm / 3.0 * 1.4 * 1.2 in Rubber Strap: 8.5 cm / 3.3 in Unit Weight: approx. 35.5 g / 1.3 oz [Receiver] Material: ABS Battery: 3* AAA batteries (not included) Size: 11 * 5 * 3 cm / 4.3 * 2.0 * 1.2 in Unit Weight: approx. 62.3 g / 2.2 oz Package List: 4* Transmitter 1* Receiver 1* User Manual(English) 1* Storage Case NOTE: LED color displayed in photos may be showing slightly different on your computer monitor since monitors. But not to impact the quality and quantity.Thank for your understanding.