Product Description Product Description Compatible Systems: The keyboard size is designed specifically for Microsoft Surface Pro 3 RO4 RO5. The keyboard supports all Windows systems and is versatile. Made of ABS material with PU molding, it has a premium feel. Designed specifically for Microsoft Surface Pro 3 RO4 tablets, it supports Microsoft systems and is versatile. Connects to power via USB interface, practical and convenient. Specifications: Lithium battery capacity: 350mAh. Operating ambient temperature: -10℃ to +55℃. Charging time: 4-5 hours (8 hours of charging required before use). Usage time: 100 hours. Standby time: 120 days. Effective operating distance: 10 meters. Material: ABS+PU Color: Black. Dimensions: 29.5 * 22 * 1.2 cm. Note: Slight color deviation may occur due to different computer resolutions. Dimensional error may occur due to different computer resolutions. Package Contents: 1 * Keyboard. 1 * Charging Cable. 1 * Instruction Manual.