ELECOM Bluetooth Numeric Keypad, Quiet Design, Compatible with Windows, Chrome OS, and macOS, Black, TK-TBM023SKBK

This Bluetooth(R) silent numeric keypad is ideal for use in places and times when noise is a concern. Silicone rubber on each keycap reduces keystroke noise by more than 90% compared to previous models. It's ideal for use in places and times when noise is a concern, 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 product (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 loudness of sound audible to humans). Equipped with proprietary firmware, it is compatible with Windows, Chrome OS, and macOS. Even if water or other liquids are accidentally spilled on the keyboard, the keyboard features a drainage mechanism that quickly drains the liquid through the drain holes on the back. (This product is not waterproof.)