Combining the Precision of a Laser Rangefinder with your Smart HD scopes onboard Ballistic Calculator. Just screw on to the front of your Smart Sight. Pair the Bluetooth. Zero-In to fine tune the adjustment. Activate all the controls via your Smart Sight. No need for additional buttons to reach for in a critical situation. Just press One Button. Take the reading to your target and the scope will instantaneously adjust your POI to match the distance. 1 Battery will last you an average of 6 months. Designed to withstand the pressures of High Caliber weapons. The ABL is built out of Hardened Aluminum Alloy with Impact Resistant Electronics. See the distance to your target on your videos. Works with ATN Smart HD Day, Night and Thermal Riflescopes.Precision to: A 1 y/mRange: 5-1000 y/mBluetooth: 4.1Environmental rating: WaterproofPairs with Smart HD: Obsidian II or higherSmart HD optics compatibility: X-Sight II HD Series, X-Sight 4K Series, ThOR 4 SeriesBattery life: 6 months or 5,000 measurementsBattery type: 1 x CR2 type, 3 VSize: 4,37"x3,43"x2,8"/111 x 87 x 71 mmWeight: 0.8 lb / 360 gWarranty: Two years