1)Bluetooth 3.0interface                              2)oprating current:4MA                                3)oprating voltage:3.7V                                              4)Li-ion battery capacity:280mAH                  5)Sleeping current:200uA                             6)charging current:200mA                               7)charge time:2Hours                                      8)standby time:90days                         9)uninterruped working time:100hours  : 10)SIZE:24*12.5*0.6CM                                   11)weight: 150G                                                         12) have 84 play key                                         13) can fit for with PU case or use with ipad 2 ipad3,  have smart cover fuction, and can remove the keyboard , 
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