based USB to TTL Serial Cable are designed using the the standard FT232RNL chipset. The cables provide a fast, simple way to connect devices with a TTL level serial interface to USB. The cables are available with a 6-way , 0.1inch connectorTTL levels is 3.3V. The TTL-232R cables are a family of USB to TTL serial UART converter cables incorporating 's FT232RNL USB to Serial UART interface IC device which handles all the USB signalling and protocols. The USB side of the cable is USB powered and USB 2.0 full speed compatible. Length:1.8cm Colour:Black Material:plastic type:TTL-232R-3V3 Package Contents: 1 x USB to TTL RS232 Serial Cable 6Pin Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.