... .7X,2X,2.5X,4.5X 4.Angle of lamplight adjust picture2picture3Helmet Multi-function Hand-free Magnifier ... Hands* This Product Installs 4 Lens,* Multiplying Power Of Lens: 1.7X,2X,2.5X,4.5X ... can be continuously used for 30 hours without change of brightness.* Even if the battery only has 30% energy ... normally used too.* Detachable bulb device,the angle of lamplight can also be adjusted.* The lens assembly ...