Ultra-thin design with a thinnest part of just 6.5mm. This Bluetooth type allows wireless connection without blocking the USB port, and employs a comfortable-to-type pantagraph key switch. ● Dimensions / Width 89.6mm x Depth 127.5mm x Height 21.5mm ● Color / Black ● Weight / Approximately 100g ● Included / User's Manual x 1, AA alkaline battery for operation check x 1 ● Supported OS / Windows 10, Windows 8.1, Windows 7, Windows XP, macOS High Sierra (10.13) ※ Updates to the latest versions of each OS and installation of service packs may be required. ● Warranty Period / 6 months ● Interface / Bluetooth ● Cable Length / None ● NumLock Key / Yes ● Key Pitch / 19.0mm ● Key Input Method / Pantagraph ● Number of Keys / 20 keys ● Quantity / 1 piece Windows 11 PRO operation confirmed. This product has been stored for a long period, so it will be inspected before shipping.