Features: Adopts 10 annularly arranged high brightness LEDs which have soft bright light and can alleviate visual fatigue. Internally-installed constant current pressure-boosting circuit can realize 60000 hours service lifetime. 8-hour continuous lighting is available due to two AA high performance alkaline batteries. Internally installed with batteries(NOT included) which will automatically shut off when external power is available. External power: Input AC 100-250V, 50/60Hz; Output: DC4.8V, 500mA. It is required to unplug external power plug in time of adopting batteries lighting. Foldable to stand up on desk or to be handheld. In time of using desk-type function, you can adjust the lighting comfort level, very easy and convenient to use. Widely used in offices, medicine, military affairs, reading, home furnishing, outdoor map operation, archaeology, mineral prospecting, antiques appreciation, etc. Specifications: Main(large) lens: Approx. 2 * 120mm, auxiliary lens: 5 * 28mm LED qty: 10 Battery: 2 * AA batteries (not included) External power supply: Input AC 100-250V, 50/60Hz; Output: DC4.8V, 500mA Product size: Approx. 28 * 17.2cm / 11.0 * 6.8in(Folded) Product weight: Approx. 275g / 9.67oz Package size: Approx. 28.5 * 18.5 * 3cm / 11.2 * 7.3 * 1.2in Package weight: Approx. 399g / 14.09oz Package List: 1 * Magnifier 1 * Power Adapter (EU power plug) 1 * User Manual (English & Chinese)