Connector 1: USB 3.1 A Connector 2: SATA 7+15 pin Cable length: 0.5 m. Product colour: Black. Manufacturer Product Type Startech Other Interface/Add-On Cards. Connects to a 2.5 SATA SSD/HDD with no accessories required.
My search is over this is the only USB to SATAIII that I have found that supports TRIM.
Only suitable for 2.5" drives as there is only 5V supplied by USB though if trim is important to you that shouldn't be a problem.