Versatile Compatibility Designed for Surface Pro 3 or 4 or 5 or 6 or 7 or 7and, providing seamless integration with multiple device generations. Ergonomic Design Features a 12anddeg ergonomic angle for comfortable typing, reducing strain during extended use. Premium Construction ABS keys with scissor mechanism ensure even pressure distribution and excellent rebound for superior typing experience. Enhanced Functionality Equipped with a multi-function touchpad and smart shortcut keys for intuitive operation. Illuminated Typing Seven-color backlight feature allows for comfortable typing in low-light conditions. Specifications: Bluetooth Version: 5.0 Working Distance: 10 meters Modulation: GFSK Operating Voltage: 3.0-4.2V Working Current: andlt 2.5mA Standby Current: andlt 0.3mA Sleep Current: andlt 40uA Charging Current: andgt 200mA Standby Time: andgt 100 days Charging Time: 2-3 hours Battery Capacity: 480mAh (with backlight) Continuous Working Time: andgt 60 hours Battery Lifespan: 3 years Key Force: 80 andplusmn 10g Key Lifespan: 5 million clicks Operating Temperature: -10℃ to and55℃ Charging Port: Type-C