Features: Compact and cost effective Optically Isolated USB serials Converter integrates a built in isolated power supply, supports adjustable signals levels (3.3V/5V via jumper), and achieves high speed communication up to 2Mbps with 1500V electrical isolation for PC safety. Featuring automatic voltages switching via input power, three color LED indicators, this module offer 100mA auxiliary power output and pin for secure microcontroller programming. Ideal for electronics engineers,and DIYer enthusiasts working on industrial automation, embedded systems, or microcontroller projects requiring stable isolated communication interfaces. Safely connects PCs to RS232 devices in environments with electrical interferences, such as factory controls, lab equipment debugging, or smart home sensors networks, with PCB slotting ensuring 3mm creepage distance. Enhanced with protective diodes, reinforced USB connectors, and waveform optimized isolation chips, this module ensures data transmission under extreme voltages while preventing backpowering issues during firmware updates. Specifications: Component: ABS Size:Approx.70mm/2.76''x27mm/1.06'' Cable Length:Approx.100cm/39.37'' Package Includes: 1Piece Optically Isolated serials Module 1Piece USB Cable note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.