Provide you with a fast and comfortable mechanical typing experience, wireless freedom. Connect up to three devices via Bluetooth or the Logi Bolt USB receiver, Use Easy-Switch to switch typing between devices. ~ Product Size:138.8 x 435 x 38.8 mm Product Weight: 739.5 g Wireless range: 10 meters 1Wireless reception range varies depending on user, usage environment and computing conditions. Mechanical axis: red axis (linear) Battery life: Up to 36 months 2Battery life varies based on usage and computing conditions. Easy-switch: Can connect 3 devices and switch Compatibility Logi Bolt USB Receiver Required: Available USB port Windows 10, Windows 11 or later macOS 10.15 or later Chrome OS Linux Accessories Included: Signature K865 Wireless Mechanical Keyboard x1, 2 AAA batteries x1, Logi Bolt USB Receiver x1 ~ • Return and refund are not accept. • Free shipping to HK/Macau when spending over $500 onwards • China area shipping fee $130 + Local SF Express + Local SF Express • Two business day shipping. Sent via SF express • Exchange of defective units purchased in 7 days ~ *Photo for reference only