USB to TTL CP2102 UART Module 5Pin Serial Convertor 5v 3.3v + FREE Cables Description: PCB size: 26.5mm * 15.6mm PCB Color: Black Weight: 4g Using the new chip CP2102 With resettable fuse. In the event of accidental short-circuit can effectively protect your device and computer USB port to download. With three LEDs: power indicator, the indicator data reception, data transmission indicator, work status at a glance. 3.3V and 5V with two power output. All the useful lead pins. With reset signal output can be directly Pro mini and other Ard uino board to download! Compatible Operating Systems: Windows 98 / Me / 2000 / XP / 7 MAC OS-9 MAC OS X-Windows CE Linux 2.40 or later