ITEM NAME:1x New USB 2.0 to TTL UART 5-Pin Serial Port Module+For 5PIN Line Descriptio n Description: Scope of application: for arduino DIY Baud rate: 300 bps to 1.5 Mbps byte receive buffer, 640 byte transmit buffer. Size: about 4.5 * 1.5 * 0.9cm line is about 20.2cm long and the center hole distance is about 0.254cm Note: Support Windows98SE, 2003, XP, Vista, Window7, Mac OSX, Linux 2.6.x Specifications: Material: PVC + electronic components Color: as shown Package Included: Product List: 1 * USB2.0 to TTL UART 5-pin serial port module 1 * 5PIN line Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. 1x New USB 2.0 to TTL UART 5-Pin Serial Port Module+For 5PIN Line.1 USB2.0 to TTL UART 5-pin serial port module. 1 5PIN line. line is about 20.2cm long and the center hole distance is about 0.254cm. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.