USB to TTL Serial UART Converter Module 5Pin for STC Download Cable Upgrade Type A USB specification 2.0 compliant with full-speed 12Mbps. Standard USB type A male and TTL 5pin connector. 5pins for 3.3V,TXD,RXD,GND & 5V All handshaking and modem interface signals rates: 300 to 1.5 Mbps. receive buffer; 640 transmit buffer. Hardware or /X-Off handshaking supported. Event character support break transmission. USB suspend states supported via SUSPEND pins. Temperature Range: -40degto +85deg Supports Windows 98SE, 2003, XP, Vista, Window7, OSX , Linux 2.6.x and 2.4.36 size:about 45 x 14 x 8mm Type:Voltage Regulator Model Number:CP2102 Application:Computer color:Red Material:PCB + electronic accessories Package Contents: 1 x CP2102 module 1 x (Random color, 't accept the specified color) Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.