Luowei LS03 High Lumen 72LED Microscope Ring Light Source Specification: 1. Model: LS03 2. Input Voltage: USB DC 5V 3. LED Pcs: 3mm 72Pcs 4. Power: 3.5~4W 5. Brightness Range: 0~100% 6. Working Distance: 40~160mm 7. Maximum Illuminance: 38000LUX 8. Color Temperature: 6500K~7500K 9. Product Lifespan: >30000 Hours 10. Net Weight: 87.6g 10. Product Dimension: 80mm Features: 1. High brightness, no heat generation, oil fume resistance, good dust-proof, and light transmittance, energy saving 2. High brightness, no flicker, soft light for eye protection 3. No visible flicker, better eye protection, more stable performance, and longer service life: high-quality LED chips save energy and reduce worries 4. Auxiliary lighting, a 5V USB interface, can connect to various chargers and power banks 5. Compatible with multiple models, often used for monocular or stereo microscopes, maximum diameter: 80mm 6. Made of environment friendly PP environment-friendly, non-toxic, high flame-retardant grade, excellent anti-aging performance, long service life, and strong load-bearing capacity 7. Safe and odorlessHigh temperature resistanceSturdy and durable