Features1Head mount magnifier composed of eyepiece and objective lens. The eyepiece is closer to the eye, and the objective lens is in front of the eyepiece. Adjustment wheels can be used to change the magnification of the magnifying glass by moving the objective lens forward or backward. 2The closer the objective lens is to the eyepiece, the lower the magnification and the wider the field of view. The further the objective lens is from the eyepiece, the higher the magnification, but the field of view will be smaller. 3Has longer focal length and the focal length can be adjusted according to the required multiple to achieve the best effect when using. 4Have locking function on the adjusting wheel. After adjusting the required magnification, the adjusting wheel can be locked to prevent the change of magnification caused by accidental contact. 5Can use the elastic headband to prevent magnifying glass fall off and affect the use effect when long time working or watching video. With a desktop stand, which is suitable for mobile phone/tablet, adjustable angle and can be folded for easy carrying when not in use.SpecificationCondition: 100% Brand NewItem Type: Magnifying GlassMaterial: ABS Frame, Acrylic optical lensFolding Size: Approx. 80 x 165 x 32mm / 3.1 x 6.5 x 1.3inUnfolding Size: Approx. 190 x 165 x 32mm / 7.5 x 6.5 x 1.3inMagnification Times 260-360 Focal Length (Approx.)4.0X260mm / 10.2in3.8X270mm / 10.6in3.6X280mm / 11in3.4X290mm / 11.4in3.2X300mm / 11.8in3X310mm / 12.2in2.8X320mm / 12.6in2.6X330mm / 13in2.4X340mm / 13.4in2.2X350mm / 13.8in2.0X360mm / 14.2inMagnification Times270-450 Focal Length (Approx.)3.8X270mm / 10.6in3.4X290mm / 11.4in3X310mm / 12.2in2.6X330mm / 13in2.2X350mm / 13.8in2.0X370mm / 14.6in1.8X390mm / 15.4in1.6X420mm / 16.5in1.5X450mm / 17.7inScope of Use: Glass frame magnifying glass used for viewing mobile phones, also can be used for watch repair, sculpture, gardening, reading, beauty, grafting eyelashes, tattoo, etc.Operation Guide:1. After wearing the magnifying glass, loosen the locking wheel on the adjusting wheel, rotate the adjusting wheel according to the required magnification, and lock the locking wheel after adjustment.2. If you need to wear glasses for a long time, replace frame with an elastic headband.Press the lock on the eyeglasses bracket and pull out the eyeglasses feet. Insert the elastic headband into the pins of the eyeglasses bracket to complete the replacement.3. Open the mobile phone bracket, adjust the bracket to the correct comfortable angle and place the mobile phone on the bracket to start viewing.Package List1 x Magnifying Glass 1 x Phone Stand 1 x Headband 1 x Lens Cleaning Cloth 1 x Storage Box 1 x Manual