This cable is recommended for the ALPA Sync Release Mk II (170.800.010). It is also functional with the Mk I type.
It features the multipin connector (12 pin) for Phase One IQ4 series digital backs.
The IQ4 needs more time between wake-up and release. So #slowphotography is the way to get the best results...
Product remarks: ALPA Sync Cord Mark III for Phase One IQ4, for ALPA Sync Release to flash sync socket (DC) and angled Phase One Multipin connector (IQ4 12 pin)