IRIS Fitness Sit Up Abdominal Core Trainer Portable Self-Suction Curl Movement Ab Exerciser  (Blue)

Feature: Easy to install and use ; Convenient for doing sit-up at home, time, money and space saver,specially for busy people who don't have so much time doing exercise outside and go to gym.Help you to build nice body, nice equipment for sports lover. Light, compact and easy to store with unlimited benefits. Ideal to gift to someone Material: Steel & Rubber& Elastic Foam Colour: Blue Type: Indoor Fitness Package with colour box: 1 Piece Package size:14*13*5 cm Weight:0.3 KG How to use: Press firmly and press the switch to adsorb on the ground. Matters needing attention: 1. The ground needs to be clean and smooth 2. There must be no gap on the ground, which will reduce the adsorption force. 3. When the adsorption force is not enough, a little water can be added, and the adsorption force will be strengthened.