Laptop-Style Workstation The keyboard can be connected with leather cover (not included) by magnetic adsorption, and change into the working mode of laptop. Bluetooth-compatible 5.0 Connectivity Advanced Bluetooth-compatible 5.0 technology ensures a stable and efficient wireless connection for Surface Pro device. Long-Range Operation Enjoy a generous 10-meter effective operating range, allowing for flexible use in various settings. Extended Battery Life With a 500mAh lithium battery, experience over 100 hours of continuous work time and an impressive standby time exceeding 100 days. Backlit Keys Illuminated keys enhance visibility in low-light conditions, improving usability and productivity. Specifications: Bluetooth-compatible Version: 5.0 Effective Operating Range: within 10 meters Modulation Mode: GFSK Operating Voltage: 3.7V Working Current: Less than 3mA Standby Current: Less than 0.3mA Sleep Current: Less than 40μA Charging Current: Greater than 200mA Standby Time: Over 100 days Charging Time: 2-3 hours Battery Capacity: 500mAh lithium battery Continuous Working Time: Over 100 hours Battery Lifespan: 3 years Key Pressure: 80±10g Key Lifespan: 5 million clicks Operating Temperature: -10℃ to +55℃