ship from Japan Interface]: USB HID specification Ver.1.1 compliant * Can also be used with USB3.1/3.0/2.0 interface. Connector:USB(A type connector) Resolution:10001600count/inch Reading method]: Optical sensor method (Blue LED) Button]: Button: 2 buttons, 2 side buttons, wheel (scroll) button, count change button Size:Approx. W67×D105×H58mm Weight:About 118g Cable length:1.5m