Product Description Battery: The battery has a large capacity and can be used continuously for more than 48 hours. Do not throw away the battery after it becomes weak. It can be used continuously for several hours, so that the repeated use of the battery is completely exhausted, and the battery can be sealed and stored separately to prolong the life of the battery. How to use: The end of this arrow does not need to be lit in advance, the string will light up automatically after shooting.It goes out when closed with a screwdriver warped up. Material: made of high quality plastic and metal material Function: very good waterproof and shockproof effect. Battery durability: high visibility and long life lithium batteries. Color: green, red, yellow, blue, purple, color six colors to choose from. Net Weight: 1.5 grams Package: 6PCS light arrow nocks,2 screwdriversThis is a product that makes it worth your while. The product is good quality, stable and cost effective. Very dazzling, you can easily find it. Please believe me, you deserve it.