This quiet, compact Bluetooth(R) keyboard is ideal for use in noise-sensitive locations and at times of the day. Its tenkeyless design maximizes desk space. Silicone rubber on each keycap reduces keystroke noise by more than 90% compared to previous models, making it ideal for use in noise-sensitive locations and at times of the day, such as public facilities, conference rooms, late at night, or early mornings. *1 *1 This is a comparison of the sound energy calculated from the sound pressure level of keystrokes between this keyboard (approximately 15 dB) and the previous model TK-FCM062BK (approximately 45 dB). Sound energy is calculated from the measured sound pressure level (bell value) and the reference value (the level of sound audible to humans). Equipped with proprietary firmware, the keyboard automatically identifies five operating systems: Windows, macOS, Chrome OS, iOS/iPadOS, and Android, and switches to the appropriate input mode. It supports multi-pairing with up to three devices, allowing you to instantly switch between registered devices with the press of a switch button. Even if you accidentally spill water or other liquids on the keyboard, the keyboard is equipped with a drainage mechanism that quickly drains the liquid through the drainage holes on the back of the keyboard. (This keyboard is not waterproof.) This processing inhibits bacterial growth and keeps the keyboard clean. (Scope: Keyboard case, printed area) *2 *2 This product has the ability to inhibit or prevent bacterial growth on surfaces and complies with the performance tests established by the Japanese Standards Association (JSA). The keyboard is equipped with a total of 15 keys and a wide range of hotkeys that can be used on five operating systems. Operations such as launching a media player and adjusting volume and brightness are possible. The keyboard uses a "membrane system" in which the keytops are supported by rubber domes.