- (void)HIDManager:(NJHIDManager *)manager deviceAdded:(IOHIDDeviceRef)device;
- (void)HIDManager:(NJHIDManager *)manager deviceRemoved:(IOHIDDeviceRef)device;
-- (void)HIDManager:(NJHIDManager *)manager
- valueChanged:(IOHIDValueRef)value
- fromDevice:(IOHIDDeviceRef)device;
+- (void)HIDManager:(NJHIDManager *)manager valueChanged:(IOHIDValueRef)value;
- (void)HIDManager:(NJHIDManager *)manager didError:(NSError *)error;