The Tru-Lite Extreme is a great way to increase the brightness of just about any archery sight. This light features three different thread adapters and a mounting plate with a screw to accommodate a wide range of archery sights. The adjustable rheostat allows for finite brightness settings and the violet LED is perfect for just about any color fiber optic. This light uses 3 LR4-1.5 V or the Energizer 392 batteries which are included. The included adapters fit 3/8"-32, 3/8"-36, and 7/16"-20 threads which are compatible with sights by Copper John, PSE, Spot-Hogg, Trophy Ridge, TRUGLO, Apex Gear, and others.