Upgraded version of the switch, more stable to use, will not light up before<br> Automatically turn on when you ; Push up by hands without dismantle if you want to turn off With lithium batteries perfect for hunting at dusk with 48+ hours of battery life,easily to track your arrows at night or daytime<br> Designed for greater efficiency in low light, enhanced precision, and vastly improved retrieval,Help you take aim at improving your archery accuracy<br> Flashing high-visibility light makes it easier to find your<br> Work for: Aluminum shafts & carbon shafts & glassfiber shafts.<br> Material:PC<br> colour:green<br> Package Contents:<br> 3 x 4.2mm luminous nock<br> 3 x 5.18mm conversion ring<br> 3 x 6.2mm conversion ring<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.