Built-in high-capacity rechargeable lithium polymer battery - 110mAh capacity - Standby time up to 45 hours on a full charge - Auto sleep saves power; wake the keypad by pressing any key within 3 seconds Multi-Function numeric keypad - 35 essential keys including all numbers, home, end, tab, page up/page down, calculator, screen capture, arrow keys, and more - Designed to increase data entry speed and accuracy - Note: due to Mac OS and IOS system, the nine keys in the upper left are non-functional for Apple/iOS/Mac users, such as page up, page down, search, screenshot, and ins Compact and ergonomic design - Made from ABS material for a sleek and durable build - Ergonomic tilt, scissor keys, and anti-slip pads on the back for comfortable use - Auto sleep function reduces power consumption; press any key to wake Widely compatible - Works with Windows/Android/IOS/OS - Compatible with your smart phone, laptop, desktop, tablets, MacBook Pro/Air, MacBook Mac Mini Use scenarios - Data entry and numeric input in spreadsheets on a PC or Mac when speed and accuracy matter - On the go numeric input with a tablet or smartphone during travel or in compact workspaces - Quick navigation and data capture while editing documents or performing calculations, using keys such as Home, End, Page Up/Down, Calculator, and Screen Capture