Usage Tips:USB White LED Light Lighting Bottom Light Lamp Source Biological Microscope Adjustable Lights and Features: It has the characteristics of high brightness, long life, low heat, low temperature, soft natural light without flash, long life, energy saving, compact appearance and convenient installation. The brightness of the LED microscope ring lamp can be adjusted, making it an for ideal source for stereo microscopes, single-tube video microscopes and other optical instruments. Applications: Biological Microscope Specification: Type: Microscope Lamp Source Material: ABS Plastic for Shell Dimension: app.4x4x4cm/1.57x1.57x1.57in Color: Black Quantity: 1 Pc Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 Pc x Microscope Lamp Source 1 Pc x Adapter 1 Pc x USB Cable