Opened and tested only after purchase. There are original scratches on the back. No claims and no returns accepted. ■ Interface: USB ■ Connector Type: USB (A) male ■ Compatible Models: Windows OS equipped with a USB port ■ Supported OS: Windows 10, Windows 8.1, Windows 7, Windows XP * Updates to the latest versions of each OS and installation of service packs may be required. ■ Color: Black ■ Communication Method: GFSK method ■ Radio Frequency: 2.4GHz band ■ Radio Wave Reach: Approximately 3m when used on a magnetic material (such as an iron desk), approximately 10m when used on a non-magnetic material (such as a wooden desk) * These are test values in our environment and are not guaranteed values. ■ Key Type: Membrane ■ Key Arrangement: 92 keys (Japanese layout) ■ Key Pitch: 19.0mm ■ Keystroke: 3.5mm ■ Power Supply (Keyboard Body): One of either AA alkaline batteries, AA manganese batteries, or AA nickel-hydrogen rechargeable batteries ■ Estimated Battery Life: Approximately 4 years when using alkaline batteries * Our test value ■ External Dimensions (Keyboard Body): Width 364.3mm x Depth 150.8mm x Height 33.5mm (excluding stand), Width 364.3mm x Depth 150.8mm x Height 42.0mm (with stand) ■ Size Classification: Compact ■ Weight (Keyboard Body): Approximately 507g * Excluding batteries ■ External Dimensions (Receiver): Width 19.5mm x Depth 15.8mm x Height 6.5mm ■ Weight (Receiver): Approximately 2g ■ Accessories: User's Manual x 1, AA alkaline battery for operation check x 1, Receiver unit x 1