Not just a light-up! LED rod tip lights, a set of 2 night fishing tip lights. (Please note that we will perform a simple inspection, so please understand that we will check them once for use.) We also have a variety of other products, so please take a look at our other listings and bid on your favorites. (I think it's easier to see if you sort by price.) The listing price is for a set of 2, so please make sure you understand. These are LED rod tip lights to be attached to the rod tip. You can fix it by attaching it to the rod tip and screwing in the LED part. The adjustment is stepless, so tighten it appropriately according to the rod tip diameter. When waiting, it blinks slowly in red, and when a hit occurs, it blinks quickly in green for a few seconds to let you know that a fish has been caught. The bright LED makes it easy to see hits even during the day. The batteries used are CR1225-3.0V button batteries, which are readily available at 100-yen shops, etc., so you can use them with ease. You can use other button batteries if they have a diameter that fits 3.0V batteries, but I don't think you can use very thick batteries. We have not confirmed the use of other batteries here. A spare mounting base is included in case of damage. Product specifications Size (approx.): 2.3cm x 2.9cm Batteries used: CR1225-3.0V button battery x 1 used One test battery is included. It is splash-proof, but please be careful of extreme water exposure. One spare mounting base is included. When shipping, the battery will be installed with the + and - reversed. Please reverse the battery when using. Operation: Waiting - Red slow blinking Hit - Green fast blinking for a few seconds