SLIM ALUMINUM DESIGN: Bluetooth number pad is constructed of solid and premium aluminum materials for long-lasting use. The ergonomic tilt supports comfortable typing and a sleek appearance (0.46 lb, 5.7 × 4.4 × 0.47 inches). Designed to complement MacBook, MacBook Air/Pro, iMac, PC, Surface Pro, laptop, or desktop as a side external numeric keypad. BLUETOOTH 3.0 CONNECTION: Bluetooth 3.0 enables a cable-free, clutter-free connection. This external 34-key full keypad extends your existing keyboard with an operating distance of up to 10 meters. For devices without built-in Bluetooth, a third-party Bluetooth adapter is required (not included). HIGH-CAPACITY RECHARGEABLE BATTERY: Built-in 160 mAh lithium rechargeable battery. Easily recharged via the included USB cable — no battery replacement needed. Features auto-sleep mode to reduce power consumption. Press any key to wake the keypad within 3 seconds. WIDELY COMPATIBLE: Includes shortcut keys and low-profile quiet scissor-switch keys for comfortable use. Compatible with Windows, Android, iMac, MacBook Pro, MacBook Air, MacBook, Surface Pro, tablet PCs, desktops, and laptops. Not compatible with Chromebook. On macOS, the “Page Up,” “Page Down,” “Search,” “Screenshot,” and “Ins” keys are not functional; all other keys, including number keys, operate normally. QUALITY GUARANTEED & WARRANTY: Each unit undergoes strict quality testing before shipment. Comes with a 2-year warranty and lifetime technical support.