Made with a Piezo Speaker, the sound from this Mini Micron is crisp and clear. It features volume controls with four settings, tone control and sensitivity control, so anglers can set it up for their preference. Fit with rubber inlays, your rod will also be protected and held in place, even when the big fish come along.Volume control button with four settingsTone control button with four settingsSensitivity control button with two different settingsTwo 5mm High Vis LEDs positioned at the top of the ears LED intensity adjustabilityD-Tec Sensing System/Roller wheel technology for clear, consistent bite detectionPower out socket 2.5mm for use with sounder boxes and illuminated bite indicatorsPiezo Speaker for crisp soundRubber inlays to protect your rod and hold it in place on savage bites.On/off toggle switchKnurled locking collarTakes Small N Type/ LR1 batteriesColour: Black