Three-Color Light Source E Products Category : Optical Products > Optical Instruments INQUIRY Details Operating Voltage input DC4.5V/output 6V, with voltage tranfer switch at the back, red, green and blue button to adjust brightness ,Round View Screen, clear picture. Send Inquiry Name:* E-mail:* Tel: Content:* Verification Code:* (All * must be filled in) [ Previous: ] [ Next: ] Related Products Three-Color Light Source C Slit Film Optical Presenter(Magnet) Optical Full Set Myopia Hyperopia Demonstrator Light Propagation Five Line Source Three-Color Light Source D