Brand NEW! With this adapter, you can connect Windows and Mac based Thunderbolt? 3 computers to older Thunderbolt devices, such as external hard drives, Thunderbolt displays, and older Thunderbolt capable Mac computers. Because this adapter is backward compatible, you can connect to first-generation Thunderbolt devices at 10Gbps speed. With Thunderbolt 2 devices, you can connect at 20Gbps. The adapter satisfies all requirements for bi-directional data transfers and simultaneous power for bus-powered devices. The TBT3TBTADAP is backed by a 2-year warranty for guaranteed reliability. Your computer's Thunderbolt 3 ports might not function properly until you update one or more of the following on your computer: BIOS Thunderbolt firmware Thunderbolt 3 controller drivers Thunderbolt 3 software The required updates will vary depending on your computer. Packaged Quantity: 1 Product Type: Data Transfer Cable Technical Information Cable Type: Thunderbolt 2/Thunderbolt 3 Cable Length: 7.90" Connector on First End: 1 x 24-pin Type C Male Thunderbolt 3 Connector on Second End: 1 x 20-pin Female Thunderbolt 2 Connector Plating: Nickel Shielding: Yes Device Supported: Hard Drive Device Supported: Printer Device Supported: Storage Drive Data Transfer Rate: 20 Gbit/s Physical Characteristics Color: Black Material: Aluminum Mylar Foil - Shielding Material: Polyvinyl Chloride (PVC) - Jacket Weight (Approximate): 2.05 oz Miscellaneous Environmentally Friendly: Yes Environmental Certification: REACH Environmental Certification: RoHS Environmental Certification: WEEE - All international buyers are responsible for all tax, duties and/or customs fees.