Walksnail Avatar USB VTX Programming Cable Options: This cable is designed for firmware upgrades on Walksnail Avatar VTX units. Choose the correct cable based on your VTX version: JST 4-pin 1.0mm: Compatible with Avatar HD 6S VTX Kit (V1) and Avatar HD 1S Kit (33mm version). JST 4-pin 0.8mm: Compatible with Avatar HD Nano Kit (V3) and Avatar HD 1s kit (30mm version). Note: Check your VTX size to ensure you select the correct cable for hassle-free firmware updates. Spare replacement USB cable for use withWalksnail Avatar VTXs. From Caddx: For firmware upgrade Avatar HD VTX kit (V1) is the same as Avatar HD 1s kit (33mm size) Avatar HD Nano Kit V3 is the same as Avatar HD 1s kit (30mm size) Avatar HD VTX kit (V1) is 4pin 1.0mm,Avatar HD 1s kit (30mm size) is 4pin 0.8mm. Includes 1x Walksnail Avatar Replacement USB Cable More Information: SKU:19057 Barcode:691023532006