I purchased the XL450-7 for $77 after seeing some reviews on YOUTUBE that were favorable as I didn't want to pay the big brand price for same functionality and I have an older Halo Interceptor. Compact size, accurate readings at realistic hunting ranges, comes with a battery. Easy to use. Fast “On”. Bow and .22 Long Rifle shooter’s delight for zero, ranging and hunting. Bests estimating ranges by steps. Some users mentioned having problems using this device wearing glasses. I was able to use it wearing glasses, although I did have to press them close to my face. I tried it out at dusk to simulate ranging near the end of legal hunting hours. No problems. Would highly recommend this item/brand.