Onboard 7-way USB expansion port, compatible with USB 2.0/1.1 transmission Using industrial-grade HUB chip, using MTT technology, 7-way USB is more stable and smooth to use at the same time Each USB port is ESD protected to protect device connections from power surge damage and data loss The on-board overvoltage protection circuit can effectively prevent the equipment from being damaged due to the access of other high-voltage power sources. Multiple protection circuits onboard: over voltage protection, over current and short circuit protection, over temperature protection, reverse current protection, under voltage lockout, 8KV ESD protection, filter protection, etc. Product Features. Onboard multiple LED indicators, easy to check the working status of the power supply and USB interface Industrial-grade metal shell, sturdy and durable, reserved screw holes for easy installation and fixation. Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. size: 138 x 51MM Material: Metal colour: black Package Contents: 1 x 7-Port Hub 1 x Power Adapter 1 x Data Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.