The Gardner ATTs Crystal Illuminated Wheel Bite Alarm is a very high quality bite alarm for carp fishing. This alarm is special because it is transparent and has a LED light under the wheel. This means that the entire alarm will glow with every bite indication. Available in blue, white, purple or red. The bite alarm has an anti-rock system to reduce false alarms. It measures 6.4 × 3.4 × 2.1cm making it very compact and lightweight. It is also completely waterproof which means that it can be used in heavy rain. The bite alarm will give you a signal when the battery level is getting too low. This alarm is supplied with a test battery.