1. The product is a pair of packs, left and right-handed can be convenient to use, and the end with a lanyard, do not have to worry about off the hand. 2. The product conforms to human body engineering mechanics without worrying about the use of fatigue. 3. The product is small and convenient, can be carried around. Put in the backpack does not occupy space. 4. The product can be magnetized Joy-con handle, easy to install and remove, plug and play.