-@property(readwrite) int vendorId;
-@property(readwrite) int productId;
-@property(readwrite) int index;
-@property(readwrite, copy) NSString* productName;
-@property(readwrite) IOHIDDeviceRef device;
-@property(readonly) NSArray* children;
-@property(readonly) NSString* name;
+@property (assign) int index;
+@property (copy) NSString *productName;
+@property (assign) IOHIDDeviceRef device;
+@property (copy) NSArray *children;
+@property (readonly) NSString *name;
+@property (readonly) NSString *uid;