Excellent fish-attracting effect! This underwater light is much more noticeable than a chemical light. It flashes about 100 times per minute. The crystal case provides a strong visual appeal underwater. This is a small, lightweight 6cm LED fishing light. It weighs about 9 grams. It's a small, lightweight type and easy to handle. Great cost performance with button batteries. (Uses three LR41 batteries.) Includes three sets of batteries as pictured! LR41 button batteries can also be purchased at 100-yen shops and home centers. This listing is for a set of 3 green lights. We also have multiple sets and other great fishing items for sale. Thank you. #FishingTackleForSale