We sincerely wish this product can release your eyes and help improve your work quality. Working distance: 11cm/0.4" 144 LED Adjustable Compact Microscope Ring Light: - Provides intense and focused shadow-free illumination - 144 bright white LED bulbs - Lighting direction changeable - Variable intensity control - Intense and focused shadow-free illumination - 100,000 hours of life - Power input: 100-240V, 50-60HZ, automatic switching - Inside diameter of the ring light: 27mm/1.1" - Overall outside diameter: 45mm/1.8" - Working Distance: 27mm-45mm/1.1-1.8" Package Included: - 1 x Microscope camera - 1 x 180X C-Mount Lens - 1 x CD - 2 x Power supplies - 1 x Aluminum alloy base - 1 x USB cable - 1 x Adjustable bracket - 1 x 2.0X Microscope Auxiliary Objective Lens - 1 x Remote control - 1 x HDMI cable - 1 x 144-LED Ring Light Note: - Battery for the remote control is not included.Usually it cost about 35USD-50USD. If you receive defective item, please kindly notify us within 14 days. This item is in the category "Business, Office & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Microscopes". The seller is "onemoredeal" and is located in this country: CN. This item can be shipped worldwide.