• LED headlight High intensity:15000-30000Lux, Continuous run-time:4 hours,Battery pack weight:100g, LED bulb:1 W,Charge voltage:AC110V/240V/50-60Hz. .2.5X loupes specification:Field Of View: 100-110mm,Viewing Angle: 20-150°,epth of field: 100mm ,Weight: 57g
• 3X loupes specification:Field Of View: 75-85mm. Viewing Angle: 20-150°,Depth of field:90mm ,Weight: 57g.3.5X loupes specification:Field Of View:60-65mm. Viewing Angle: 20-150°.Depth of field: 80mm
• 4 kinds of working distance : S(280 - 380 mm), R(360 - 460 mm), L(440 - 540 mm), XL(500 - 600 mm).How To Choose Your Loupes Determine your working distance, which will also automatically determine your field of view. While working on a friend or family member have someone measure the distance from your eyes to your friend's mouth or body: this is you working distance.
• Choose the distance that is closest to the selection we offer.If you are dentist , your height is in the range from 160cm to 180CM,we recommend R(360-460mm) working distance.If you are sitting while working, your height is from 160cm to180cm, we recommend working distance R (360-460mm ). IF you are standing while working, your height is from 170cm to 180cm, we recommend L (440-540mm) working distance, even XL(500-600mm) working distance will be suitable.