Features:- USB powered LED Magnifying Lamp with a clamp features a 5-diopter 5X real glass lens in 4 18" diameter to provide a clear magnifying view, less eye fatigue & dizziness; Suitable for old people, jewelers, sew, make crafts, etc- 3000 to 6500k energy saving LED lamp with 72 pcs light beads features 3 color modes including cold, natural & warm white and 10-level brightness adjustment- With 360-degree swivel light head & retractable metal arm to achieve various angles & heights lighting; Features 4 springs to ensure a smooth movement & keep the arm stable- Features a clamp with opening size ranges from 316" to 2 516", allowing you to clip it on the table, shelf or workbench- Metal baking varnish arm & aluminium alloy baking varnish lamp shell for anti-corrosion & durability; LED light with over 25000 hours lifespan for long time use; CE, ROHS & PSE certification for safety useSpecifications:- Overall Dimension(LxWxH): 27 1516" x 6 516" x 1 18" (71 x 16 x 2.9 cm)- Magnifying Lamp Inner Diameter: 4 18" (10.4 cm)- Magnifying Lamp Outer Diameter: 6 516" (16 cm)- Voltage: 100 to 240 V- Power: 12 W- Adapter Power: 5 V-2 A- Color temperature: 3000 K to 6500 K- Illumination: 800 to 1200 lm- Light lifespan: Over 25000 H- Adjustable Arm Total Length: 27 1516" (71 cm)- Upper Arm Length: 15 18" (38.4 cm)- Bottom Arm Length: 14 1116" (37.3 cm)- Clamp Opening Size: 316" to 2 516" (0.4 to 5.9 cm)- Clamp Hole Size: 12" (1.2 cm)- Cleaning Cloth Size(LxW): 6 1116" x 5 12" (17 x 14 cm)-