1. Bluetooth 3.0 interface standard. 2. Operating Distance to 10 maters. 3. Modulation System: GFSK 4. Layout :QWERTY/AZERTY/QWERTZ 5. Standby Time: >100 days 6. Number of key :78 7. Battery Capacity: 7AAA*2 8. Uninterrupted Working Time: 100 hours 9. keyboard color :Black 10. Key Strength: 80+-10g 11. Key Life: 5 million strokes 12. Support system :for Windows /Android /ios.