There are three easy-to-use buttons just below the roller on the face of the alarms, and these display the volume, tone and sensitivity control.To match the alarm there is a matt black speaker with an anodised finish that acts as the receiver remote, which boasts a power switch and a sync button for control when not in close range of the alarms. The top of the receiver displays eight powerful LED\'s that indicate purple of a bite and white for a drop back, which will highlight that you need to reduce resistance in order to catch the fish. Need to search for something in the bivvy? Use the third, bigger light as a torch.You don\'t need to fret about accidentally dropping the alarm in water, as they are all 100% waterproof - an essential component of any piece of fishing equipment. Operates with 2 x AAA 1,5 V batteries (Not Included)5 Volume settings and a silent mode4 Sensitivity settings7 Tone settings100% waterproofWhite PTFE rollerDedicated drop back LEDDedicated drop back toneExtending illuminated snag earsReceiverOperates with 2 x AAA 1,5 V batteries (Not Included)Last bite/Memory functionSilent modeVibration modeDedicated run and drop back LEDCourtesy night light100% waterproof