<ul><li>Multi-Person Use</li><li>Stylish Designs</li><li>Adjustable Angular Viewing</li><li>Ultra Light Weight (75.0 grams) One Step Pupillary Adjustment</li><li>Ultra Light Weight (75.0 grams) One Step Pupillary Adjustment</li></ul> Parameters: Magnification 3.5X Working distance 420mm Depth of field 80mm Field of View 60mm Weight 52g Power3W Intensity:15000-30000lux Color Temperature:6000K The lifetime of the bulb:100000 h Continus run-time:5 h Voltage: AC100-240V/50-60HZ The brightness can be adjust 4 Color for you choose: Blue Red Silver Black

3.5X420mm Bonicular Loupes Magnifier with 3W Operation Head Lamp Aluminum Box (Black)