1.Helmet Magnifier with LED 2.With 2 batteries can used 30 hours 3.Multi power:1.7X,2X,2.5X,4.5X 4.Angle of lamplight adjust picture2picture3Helmet Multi-function Hand-free Magnifier with LEDFeatures:* Free operation with Two Hands* This Product Installs 4 Lens,* Multiplying Power Of Lens: 1.7X,2X,2.5X,4.5X Applications: It can be quite ealisy used under the following conditions:* Operate or read ...