FT-1038E Detachable Bluetooth 3.0 Aluminum Alloy Keyboard + Lambskin Texture Leather Tablet Case for iPad Air / Air 2 / iPad Pro 9.7 inch, with Pen Slot / Water Repellent / Three-gear Angle Adjustment / Magnetic / Sleep Function (Black Silver)

1.Bluetooth version 3.0
2.Effective distance within 10m
3.Lithium battery capacity: 250mA
4.Charging time is 2-3 hours
5.100 hours of sustainable working hours
6.Standby for 100 days
7.Working voltage: 3.0-4.2V
8.Working current: <2.5mA
9.Standby current: <0.3mA
10.Sleep current: <40uA
11.Charging current: >200mA
12.5 million button click life