Compatible with CH340G, handles all USB signals and protocols. TTL level 5V and 3.3V adjustable design, draws directly from your PC/Laptop via USB connection, no external adapter required.Provides access to UART transmit (Tx), receive (), , , VCC and GND connections; POW(), RXD/TXD transceiver communication LED indicator design, serial adapter status and data activity at a glance.Windows 8 and above, Linux, and OS automatically install the driver, but are not compatible with Chrome OS.The new 340 chip, this series of is the recommended USB to TIL chip by STC, there will be no incompatibility due to different drivers and different computers Not only the light PwR, but also the TXD and RXD indicators, the reserved and positions are convenient to intuitively know whether the product is working without the instrument.Support: WINDOWS 98/ME/2000/XP/Serverl, 2003/VISTA/Server 2008/Win7/Win8 32bit/64bit3V3 and 5V are by the short circuitColour: black + goldMaterial: abs + metalSize: 6x3x2cmPackage Contents:1 * Motherboard5 * 1 * PinOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.