This night fishing bite alarm uses a sensor to detect the tilt of the rod and alerts you with sound and light! Essential for night fishing! Features: * Loud alarm volume * LED lamp (white) flashing - do not look directly at it ⚠️ The body is made of break-resistant ABS resin, making it resistant to impacts such as drops. This depends on the conditions of use. The sensor is IPX4 water-resistant, so you don't have to worry as much about water getting in on rainy days and the sound not working, but you can also put it in a plastic bag, etc. ⚠️ IPX4 water resistance: Safe to touch with wet hands, and withstands some rain or splashes. Many products, such as mobile phones, digital cameras, and emergency radios, fall into this category, and it's the minimum level needed for kitchens and outdoor use. Protected from harmful effects of water spray from any direction. Tested with 10 liters/minute of water sprayed from all directions from a height of 300-500mm for 10 minutes. Splash-proof. Not sold in fishing tackle stores. Easy to attach and detach with a clip. This clip securely holds the rod and has rubber to prevent scratches. The sound and light are designed to be heard and seen even in the sea breeze. However, as this is a handmade product, there may be slight variations in sound and light. Please understand. Uses two AAA batteries. Economical. How to use: Pull out the sensor's pull pin, and the alarm and LED lamp will flash and sound when the rod tilts (on). Push the pin in to turn it off. Caution ⚠️ The pull pin does not come out completely. It remains attached to the main unit. The screws are stainless steel, but for the clip, bell, spring, and pull pin, apply a lubricant (such as silicone oil) after fishing to prevent rust. Photos 4-5 are for reference. The sensitivity of the sensor can be adjusted depending on the angle, so adjust it as needed.