All the performance of the Echo full size, in the ergonomic open-bridge style for a secure one-handed grip and comfortable feel rain or shine. Superior Bak-4 prism glass, fully multi-coated for sharp contrast and true color, plus trail-armored, waterproof, non-fogging polymer construction that takes weight off your neck but stands up to the demands of the outdoors. Available in 10X power. Features:Bak-4 Prism Glass. Full Multi-Coating. Waterproof. Nitrogen filled/fogproof. Polymer Frame w/ Ergonomic body armor. Tripod/ monopod compatible. Limited lifetime warranty. Power: 10X. Objective Diameter: 42 mm. Eye Relief: 15mm. Exit Pupil: 3.2mm. Field of View: 315 ft @1000 yds. Prism Coating: AL. Eyecup Type: twist up. Close Focus: 8ft. Includes: Lens covers, neck strap, and carrying case.