This product is a wireless body arm trainer and abdominal sports fitness massager pad. It is made of PU and plastic, and comes with a USB cable for charging. The product includes three pieces: one abdominal patch, two arm patches, and one main unit. It has 19 gears and can be used in various scenarios such as the gym or at home. To use, simply stick the fitness device onto your body, buckle the host onto the patch, and press the '+' button to start. Choose the appropriate gear according to your physical adaptation, and stop working by pressing the '-' button until it reaches 0.