Brand Name: TRANSCEND Model No: 25H3 4 TB Store Jet Military-grade shock resistance* Fully Compliant with the Hi-Speed USB 2.0 specification Advanced 3-stage shock protection system Durable anti-shock rubber outer case Advanced internal hard drive suspension system Three Year Warranty SPECIFICATION Size 4TB: 131.8mm×80.8mm×24.5mm (5.27" x 3.23" x 0.98") Weight 4TB: 308g (10.86 oz) Operating Voltage: USB DC 5V Operating Temperature: 5°C (41°F) ~ 55°C (131°F) Storage Media: 2.5" SATA HDD Certificates: CE, FCC, BSMI Connection Interface: USB 2.0/3.0 Power Saving Mode: 10 mins One-Touch Backup: Yes Note: Based on U.S. military drop-test standards MIL-STD-810G 516.6. The drop test performed in non-operating state does not guarantee the invulnerability of this product under any circumstances. More information about Transcend's MIL-STD test can be found here. Transcend Elite software is required for this function. Warranty: Three-year Warranty Please access here for more information about Transcend Warranty Policy. System Requirements: Desktop or notebook computer with a USB port and one of the following operating systems: Microsoft Windows 7 Microsoft Windows 8 Microsoft Windows 8.1 Microsoft Windows 10 Mac OS X 10.7 or later Linux Kernel 2.6.31 or later ADDITIONAL FEATURES Military-grade shock resistance* Fully Compliant with the Hi-Speed USB 2.0 specification Advanced 3-stage shock protection system Durable anti-shock rubber outer case Advanced internal hard drive suspension system Quick Reconnect Button – after safely removing the hard drive from the system, press to reconnect the drive without having to unplug and replug the USB connector again One Touch Auto-Backup button** 256-bit AES file & folder encryption** Exclusive Transcend Elite data management software Brand Transcend SKU TR016EL1H50TSNAFAMZ-65992 Model 25H3