Spro C-TEC Zeeker Alarm Blue The Zeeker bite indicator offers a wide range of volume and tone settings, as well as blue LEDs and a sensitive line roller. It is powered by a 9V battery and is splash-proof. The two blue LEDs ensure good visibility. The volume and tone can be individually adjusted for different conditions. The sensitive line roller reacts precisely to movements. The bite indicator is splash-proof and therefore ideal for use in different weather conditions. Requires 1x 9V battery (please order separately).