This slim, compact wireless keyboard is as thin as a single piece of wood, measuring just 6.5mm at its thinnest point. This 2.4GHz wireless keyboard offers stable communication and comfortable operation. It features a compact, unobtrusive micro-receiver the size of a 1-yen coin. No dedicated driver installation is required; simply plug it in and you're ready to go. The keypad employs a pantograph system, similar to laptop keyboards, allowing for light keystrokes. Built-in metal plates under the keycaps provide a firm, stable feel. It features input modes optimized for both Windows and Macintosh operating systems. Despite its compact size, it features a 19mm key pitch and 104 Japanese keys for comfortable typing. Power Supply (Keyboard): Two AAA alkaline batteries, AAA manganese batteries, or AAA nickel-metal hydride rechargeable batteries. Accessories: User's manual x 1, AAA alkaline batteries x 2 for operation verification, and receiver unit x 1