Magnifying Glass LED 10X Magnification Magnifier Lens Adjustable for Reading Observation Item Type: Magnifying Glass Model: 7719-21 Material: ABS + Optical Glass Battery: 1 x rechargeable lithium battery 1.5A 1200mAh (built in battery) Function: For object observation. Product Size: Approx. 24 x 12 x 2.5cm / 9.45 x 4.72 x 0.98in Product Light Source: 21 x LED Light Colour Temperature: Cold light, warm light, mixed light (adjustable) Adjustment Method: Press Touch Product Magnification: 10X Lens Diameter: Approx. 85mm / 3.35in Product Power Supply: USB Charging Battery Life: 8~10 Hours Charging Time: 1.5 hours can be fully charged. Indicator Light: Charging (blue light), fully charged (red light). Application: In office, school, outdoor, home, printing, welding, biological observation, jewelry and antique appreciation, etc.