bluetooth keyboard with touchpad for ipad ,Made of ABS Plastic

With touch film screen, sensitivity 600 dpi,
Operating system: Windows XP or above;
Fn, Num Lock digital composite function;
The built-in 3.7 V 760 mah lithium battery;
Mini USB charging
Key total stroke: 3.0 + / - 0.1 mm
Initial action pressure: or 25 cn
Operating pressure: standard key: 55 ± 7 cn
Insulation resistance: 100 v DC, 100 m OHM
Elastic contact: 5 or less ms
Working voltage: + 3 v DC plus or minus 10%
Working current: + 3 v DC < 40 ma
Electrical load: 10 million times or more
Storage temperature: - 20 ℃ ~ 70 ℃
Working temperature: ℃ ~ 60 ℃
Humidity: the condensation state relative humidity is 30% ~ 95%