EVM EnAir Rechargeable Wireless Keyboard With Touch Pad WLK-009 Bluetooth 5.0 with Type-C Interface, Ultra-Slim & Lightweight, Compatible with Tablets, Smartphones BlackSpecifications: ● Bluetooth Version 5.0 ● Type-C Interface ● Power Source: 180mAh Lithium re-chargeable Battery ● No. of keys： 78 Key ● Switch Life: 10 million keystrokes ● System Requirements:>OS Support: Windows I macOS I Android I Linux I Chrome OS ● Battery Life: Up to 30 days ● Charging Time : 2 hours approx. ● Effective Range : Up to 10 meters