?LaserBallistics helps you Shoot like a Pro! It designed for shooters and hunters. - ATNs LaserBallistics Series of Laser Range Finders can be used with any ATN Smart HD Scope. - Or any traditional Rifle Scope as a stand alone Ballistic Calculator. - By using ATNs Ballistic Calculator App on your Smart Phone or Tablet. - Magnification: 6x - View angle: 7.2° - Precision to: ± 1 y/m - Range: 5-1000 y/m - Speed range: 0-186 mph / 0-300 km/h - Bluetooth: 4.0 - Smart Phone Applications: Android or iOS - Environmental rating: Waterproof - Pairs with Smart HD: Obsidian II or higher Day Scope Compatibility - Traditional Optics Compatibility: Works with Mil and MOA scopes using ATN Ballistic Calculator App - Battery type: 1 x CR2 type 3 V - Size: 4.17 x 1.38 x 2.87 / 106 x 35 x 73 mm - Weight: 5.4 oz / 152 g - Warranty: Two years