1: standard Bluetooth 3 version
2: the effective distance is 10 meters
3: standby time: 100 days
4: continuous working time: 70 hours
5: charging time: 4-5 hours
6: lithium battery capacity: 200mha
7: lithium battery life: 3 years
8: apply to apple / Android system
9: product size: length 26cm* width 8cm [keyboard length is about the same length as iPad4,9.7 inch flat], compare with mini, please clap according to demand