Features: Bluetooth-compatible5.0 supports pairing and switching of Two devices at the same time The product comes with a 2.4G wireless USB Receiver, which is stored in the battery compartment. The product is an energy-saving wireless solution, and the normal battery life can last for more than 2 months.Adopt hot-swappable shaft seat, support 5-pin shaft and triangular shaft hot-swappable. 68-key high quality meterial,support 3pin and 5pin hot swappable function. Bluetooth-compatible5.0 is not compatible for WIN7, it is recommended to connect under for WIN10 system. Specifications: Product name: Mechanical Keyboard Product arrangement: standard 68-key compact arrangement Connection method: wireless 2.4G and Bluetooth-compatible5.0 2.4G- mode: 125hz Power supply mode: AAA battery AAAx 2 (Batteries not include) Satellite axis-: white POM- positioning board satellite axis Housing: White ABS plastic Product weight: about 600g Product size: about 310x100x30mm/12.20x3.94x1.18inch Shaft- lubrication: factory lubrication,10 million keystrokes lifespan- Package Includes: 1PCx Mechanical Keyboard Shaft Tester Body 1Setx 72xRed Shaft note: The shaft- tester does not include the keycap and shaft- body, and comes with a satellite shaft-.<br/> The shaft- tester does not support wired- connection and has no USB interface. The axls tester package does not ship with batteries, please purchase AAA- batteries on your own. Due to the different monitor- and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation- due to manual measurement.