Stay in control of your swim and keep a watchful eye on every movement with the Prologic C-Series Pro bite alarms. The alarms feature six different levels of sensitivity, alert tones, and volume levels (including silent), so you can customise them exactly to your personal preferences or the situation. This set includes a receiver and a wireless bivvy light. The C-Series Pro alarms will help you determine exactly whats going on in double-quick time thanks to a smart system that helps differentiate between a bite and drop back. When theres a bite the left colour LED will illuminate for 20 seconds, when there is a drop back the right white LED will illuminate. Drop backs also always feature the same low tone regardless of which other tones are selected to help you easily differentiate. An illuminated hanger or swinger can be fitted in the 2.5mm socket and the alarms separate night light is activated at the push of a button. The alarms are also weatherproof and feature a rubberised housing to ensure they stand the test of time.