3.5X 10X MultiFunctional Handheld Folding Magnifying Glass LED Light Reading Magnifier Condition: Item Type: Magnifying Glass Material: ABS, Acrylic Optical Lens Product Size: Approx. 210 x 110 x 32mm / 8.3 x 4.3 x 1.3in Product Magnification: Primary Lens: 3.5 Times, Secondary Lens: 10 Times Lens Size: Primary Lens: Approx. 90mm / 3.5in, Secondary Lens: Approx. 20mm / 0.8in Lens Focal Length: Primary Lens: Approx. 142mm / 5.6in, Secondary Lens: Approx. 45mm / 1.8in Lighting Source: 8 annular LED lights Power Supply Mode: 1. 3 x AAA Batteries (Not Included) 2. External USB power supply Scope of Application: Reading books/magazines/newspapers/maps, reading fine printed matter, exploring nature, collecting coins and stamps, etc. Applicable Places: Widely used in offices, medicine, military, outdoor operations, archaeology, mineral exploration, antique appreciation, etc. Precautions: 1. Do not place this product near fire sources or high temperature locations/sometimes the lens or frame may be deformed or deteriorated due to heat. 2. Do not drop or bend the magnifying glass or impact the magnifying glass with force. Cutting the lens is very dangerous. 3. Use a soft cloth or facial tissue suitable for glasses when it gets dirty, gently wipe the lens.