DEEPOWER Universal Fit Nock Automatically LED Lighted Nock fits G, X, and S Series Arrows with 4.2mm/.165 Inside Diameter, Including 0.204, 0.244 LED Archery Nock

NO ASSEMBLY REQUIRED-Upgraded version of the switch, more stable to use, will not light up before shooting FITS ARROWS WITH INSIDE DIAMETER .165, .204, .244，Including Carbon Tech, Victory, Carbon Impact, Carbon Express, Carbon Revolution, Easton, Beman and PSE Convenience Usage - Automatically turn on when you shooting; Push up by hands without dismantle if you want to turn off With lithium batteries perfect for shooting hunting at dusk with 48+ hours of battery life,easily for you to track your arrows at night or daytime Any Issue with Product, Please Contact us. Replacement or Refund is Supported.