As far as we know, there are some early watch motherboards that can not
be accessed DFU mode through by press 2 buttons (but not all
motherboards ). So this data cable will help you do the job ! and this cable compatible for all ibus.
How to use ?
Connect the Diag Cable to Computer USB port
Connect the usb lightning cable to Diag Cable
Connect your watch via iBUS
How to go to DFU & Recovery mode for Apple Watch ?
Package content:
Detailed Ratings: 
