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