http://uk.transcend-info.com/Products/CatList.asp?LangNo=0&ModNo=324 Features: - SuperSpeed USB 3.0 compliant and backwards compatible with USB 2.0 - Durable anti-shock silicone outer shell - Advanced internal hard drive suspension system - Connection bandwidth up to 5Gbits per second - Extra-large storage capacity - Sleek ultra portable design - Easy Plug and Play operation – no drivers required - USB powered – no external adapter necessary - Power saving sleep mode - One Touch Auto-Backup button - Includes Transcend Elite backup and security software - LED power / data transfer activity indicator - Three-year Limited Warranty Specifications: Size 130.8mm×80.8mm×19.0mm (500GB/750GB/1TB) 130.8mm×80.8mm×21.7mm (1.5TB) Op. Voltage USB DC 5V Op. Temperature 5°C (41°F) to 55°C (131°F) Storage Media 2.5" SATA HDD Weight 216g (500GB/750GB/1TB) 256g (1.5TB) Certificates CE- FCC- BSMI Connection Interface USB 2.0/3.0 Power Saving Mode 10 mins One Touch Backup Yes