Features: brand new and high quality Rocketek USB sharing switch for 2 Computers sharing 4 USB 2.0 ports.which saves money and for time. Widely used in keyboard, mouse, USB printer, scanner, curve plotter, multifunction printer, flash drive and other USB deivce between 2 computers. Easily switch between 2 computers by a single click on the button with LED indicating the active computer. Plug and for play. convenient and efficient. When using a high-power USB device, external 5v adapter is required. Normally, no external adapter is required. Specifications: Band: Rocketek Item:KVM Switch Box USB 2.0 Input: 2 USB 2.0 Ports/3.0 Ports Output: 4 USB 2.0 Ports Mirco USB: 5v/1A- Power Input Material：Aluminum+PC Size：Approx 10.5x5.4cm/413x2.12in Package Includes: 1 x USB Switch 2 in 4 Out（USB 2.0 /3.0 Ports Optional） 2 x USB A to A Data Cable note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Any charger with higher voltage than 5 V output is NOT allowed and may affect the product Devices like HDDs and digital video cameras might need external power to running. Please make sure use standard 5v Adapter for powering while using high power device.