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. Audio and visual alerts will enable you not to miss a bite and makes your fishing easier. [Transmitter]: LED alarming signals with high output speaker. High visibility LED latching about 20 seconds. Adjustable volume control. Silent mode. Adjustable tone control. Adjustable rubber strap to easily install on your fishing rod(not included). Suitable for day and night time fishing. Powered by 3 x LR44 button cells(not included). Low battery singal. [Receiver]: Receiver has over 100meters transmission range. On/off button.Adjustable volume control button.Vibration control button. 256 variable code enough to prevent interference from another angler. Different color LED lights for receiver to match different alarms for transmitters. High visibility LED latching about 40 seconds. Powered by 3xAAA batteries(not included).Low battery singal. [Transmitter]: LED Color:Colors are random, no specifications accepted. Battery:3xLR44 button cell (not included) Size:7.5x3.5x3 cm/3.0x1.4x1.2 in Rubber Strap:8.5 cm/3.3 in Unit Weight:approx. 35.5 g/1.3 oz [Receiver]: Battery:3xAAA batteries (not included) Size:11x5x3cm/4.3x2.0x1.2 in Unit Weight:approx. 62.3 g/2.2 oz Colour:Black Material:ABS Package Contents: 1 * Receiver 4 * launcher Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.