I used this for about a month, but I no longer use a PC, so I am selling it. There are no issues with the operation. Batteries are not included. PFU Bluetooth Keyboard HHKB Professional HYBRID Type-S English layout PFU HHKB Professional HYBRID Type-S "A flagship model with all the desired features" Bluetooth connection and USB connection (Type-C), keymap change function, "Type-S" key structure with excellent Speed (high typing speed) and Silent (quietness). This flagship model incorporates numerous innovations on top of tradition, effortlessly adapting to all aspects of the modern IT scene. ■ Interface: Bluetooth Ver4.2LE Class2, USB Type-C (Type-C to Type-A cable not included) ■ Key specifications: Electrostatic capacitive non-contact method, 45g pressing force, 3.8mm stroke, cylindrical stepped sculpture, key pitch 19.05mm ■ Size (mm): W 294 x D 120 x H 40 (up to the top of the keycaps)