WHITE Compact Keyboard Wireless Wired Keychron B1 Pro Features Ultra-Portable Design: The B1 Pro is a lightweight, ultra-portable wireless keyboard that supports 2.4GHz, Bluetooth, and wired connections, ensuring versatility in your work environment. Extended Battery Life: Enjoy up to 1200 hours of usage on a single charge. You can even operate the keyboard while charging, making it ideal for continuous use without frequent interruptions. Advanced Wireless Connectivity: Experience seamless performance with a 2.4 GHz wireless connection and a 1000 Hz polling rate. Effortlessly switch between devices using Bluetooth 5.2 for effective multitasking. Customizable Features with ZMK: Leverage the Keychron Launcher web app for comprehensive customization, including key remapping, macros, and shortcuts, enhancing your typing experience. Cross-Platform Compatibility: Designed with a Mac layout while fully compatible with Windows. Retain multimedia and function key functionalities, with easy keymap configuration for both operating systems. Ergonomic Key Design: The concave keycaps provide precise input and a comfortable typing experience, minimizing errors and maximizing efficiency. Quick Emoji Access: Easily access emojis using the ‘fn’ ‘shift’ shortcut, enabling quick expression during your communications. Durable Protective Cover: Each keyboard comes with a silicone key skin that is individually molded for a perfect fit, enhancing durability while protecting against spills and dust. Ergonomic Support: The keyboard features a tilt angle of 3.2 degrees and an ultra-thin profile of 5.2mm, offering stability and comfort during extended typing sessions. Expert Specs Number of Keys: 77 (75%) Number of Multimedia Keys: 12 Body Material: ABS Keycap Material: ABS Layout: ANSI  Polling Rate 1000 Hz (2.4 GHz & wired) / 90 Hz (Bluetooth) Backlight: Non-Backlit NKRO Support: No CONNECTIVITY AND POWER Battery: 800 mAh rechargeable li-polymer battery Wireless  Working Time: Up to 8 months (Lab test result may vary by actual use) Charging Time: Around 2.5 hours Connection: 2.4 GHz / BT / Type-C Wired Bluetooth version: 5.2 Bluetooth Device Name: Keychron B1 Pro Compatible System: macOS / Windows / Linux PHYSICAL UNIT Dimension: 296 x 130 mm (11.65 x 5.11″) Weight: 425 g / 0.94 lbs Height (front): 5.2 mm (0.2″) Height (rear): 14.5 mm (0.57″) Typing Angle: 3.2º MCU: NRF52840-QIAA-R_AQFN73 Operating Environment: -10 to 50℃