This fishing alarm with LED indicator is very sensitive to fish which swallows the bait, it sounds loud so you can walk away or have a rest over one hundred meters. Features: -Transmitter Special varnish decorations. Low battery signal. LED alarming signals with high output speaker. High visibility LED latching about 15 seconds. Aluminum removable snag bar. Warning LED light with color of Red and Yellow. Adjustable Volume, Tone button. Protective coated electronics. Separate battery compartment. Work with a 9V battery(not included). -Receiver Over 100m transmission range. 256 variable code enough to prevent interference from another angler. Special varnish decorations. Low battery signal. On/off, adjustable Volume, Vibration button. 6 colors LED lights to match 6 alarms. Protective coated electronics. Separate battery compartment. Black antenna. Working with 3 AAA batteries(not included). Specifications: Material: ABS Color: Black Receiver Size: 8.5 * 5 * 2.5cm / 3.3 * 2 * 1in Case Size: 25 * 16 * 6.5cm / 9.8 * 6.3 * 2.6in Product Weight: 400g / 0.9lb Package List: 1 * Receiver 4 * Transmitter 1 * User Manual 1 * Case