description: , feature: 1. Support parallel port: Support USB to printer parallel port and EPP or MEM parallel port. 2. Support serial port: Support USB to UART, I2C, SPI interface. 3. Output voltage: The output voltage and signal level can be selected from 3.3v or 5v. 4.Onboard UART and SPI / I2C working status indicator specification: Material: Electronic material Size: 4.4x2.6cm / 1.73x1.02in color: blue quantity: 1 Transition: 1cm = 10mm = 0.39inch. Due to manual measurement, please allow 0-1 cm error. Before you bid, make sure you do n't mind. Due to differences between monitors, the picture may not reflect the actual colors of the item. Thank you The package includes: 1x converter (not including other accessory demos in the picture.) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.