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:BIOSThunderbolt firmwareThunderbolt 3 controller driversThunderbolt 3 softwareThe required updates will vary depending on your computer.Packaged Quantity: 1Product Type: Data Transfer CableTechnical InformationCable Type: Thunderbolt 2/Thunderbolt 3Cable Length: 7.90"Connector on First End: 1 x 24-pin Type C Male Thunderbolt 3Connector on Second End: 1 x 20-pin Female Thunderbolt 2Connector Plating: NickelShielding: YesDevice Supported: Hard DriveDevice Supported: PrinterDevice Supported: Storage DriveData Transfer Rate: 20 Gbit/sPhysical CharacteristicsColor: BlackMaterial: Aluminum Mylar Foil - ShieldingMaterial: Polyvinyl Chloride (PVC) - JacketWeight (Approximate): 2.05 ozMiscellaneousEnvironmentally Friendly: YesEnvironmental Certification: REACHEnvironmental Certification: RoHSEnvironmental Certification: WEEE- All international buyers are responsible for all tax, duties and/or customs fees.