الجلوس مساعد الكاحل دعم البطن الأساسية تجريب اللياقة البدنية الجلوس بار المحمولة Situp شفط

 Instructions for use:

1. After you assemble the product,you need to find a clean, smooth and dry surface without gap, then press down on the handle and press down the switch.

2. Because the suction cup is based on the principle of squeezing the air inside to achieve adsorption, it is necessary to ensure that there is no air inside when it is adsorbed.