This is a Topre computer keyboard, REALFORCE R3 series (R3HC11). I've been using it for about a year. Details are as follows: https://www.realforce.co.jp/products/R3HC11/ * Product Specifications * Interface: Bluetooth 5.0 & USB * Size: 163mm × 379mm × 30mm * Weight: 1.3Kg * Body Color: Black * Keycap Color: Dark Gray * Keycap Material: PBT * Key Arrangement: Japanese * Number of Keys: 91 * Key Stroke: 4.0mm * Key Printing: Dye-sublimation * Kana Printing: With Kana * Key Weight: 45g * Key Structure: Step Sculpture * N-Key Rollover: Full N-Key Rollover * Switch: Topre switch (capacitive non-contact) * Switch Life: Over 50 million presses * Cable Length: 1.8m (detachable) * OS: Windows 10～ * Country of Origin: Japan * Contents: Keyboard body / Instruction manual (warranty) / 2 AA batteries / USB cable (Type-A ⇔ Type-C) Color: Black