[Important Reminder] The method of using the fishing bite warning light is as follows: Rotate the LED light and take out the internal button battery. Turn over the button battery and reinstall it in the LED light. When you turn the battery over andscrew the battery cable back, please make sure that the front side of the battery is folded. Finally tighten the LED light, the LED light will light up. [High Quality] OHOH LED night fishing rod bite warning light is made of plastic clip and bimetal bell. They are connected together by springs and will not fall off. Very suitable for night fishing in the dark, very suitable for professional fishermenand fishing enthusiasts [Easy to use] When you need to fish and bite the alarm light, you only need to turn over the upper battery. When the LED fish light, please restore the battery to the original position to save power. If the battery for the rod bite alarm runs out, itcan be used as a bell. Just clip the bell to your catfish fishing pole and it will ring when the fish attacks. [Set includes] 10 fish bite alarms with green light + 10 fishing bite alarms with red light.