Surgical Loupes, Head-Mounted Surgical Binocular Loupes, Used in Orthopedics, Microsurgery, Surgery, Oral Surgery, Binocular LoupesFeature:1. Galilean optical design, apochromatic, large field of view, long depth of field, high resolution.2. Using high-quality optical lenses, multi-layer coating process, Philippine spherical objective lens design.3. The full field of view imaging is clear, without deformation and distortion.4. Ergonomically designed headband is more comfortable to wear.Specification:Maginification: 3.5xWorking distance: 320-420 mmField of View: 60 mmSize: 20cm x 14cmPackage Included:1 * 3.5X Head Wearing Dental Loupe1 * Head Strap1 * User ManualCautions:1. When use the battery power supply, you need to charge in time if brightness of the light significantly weakened.2. This product can only work in DC condition. It can not work while charging.3. Turn off the power when you do not use or charging.