Specifications1.Bluetooth Virtual Laser Keyboard for iPad, iPhone and other smartphonesKeyboard Projection1.Light source:Red diode laser2.Keyboard layout:63 key / full sized QWERTY layout3.Keyboard size:295 x 95mm projected keyboard size4.Keyboard position :60mm from VKB unit5.Required Projection surface:Non-reflective, opaque flat surface6.Visibility:Good contrast up to 600 lux ambient illuminationKeyboard Sensor1.Ambient illumination:Works under all standard indoor illuminations up to 600 lux2.Detection:Rate Up to 400 characters per minute3.Detection algorithm:Multiple keystroke support4.Effective keystroke: Approximately 2mm5.Operating surface:Non-reflective, opaque flat surface6.Visibility :Any firm flat surface with no protrusions greater than 1mm