Specification: Product Name: Bio-stress feedback device (core muscle group activation device) Transformation: flat, folio, double fold Instructions for use: - Biological pressure feedback device of the three airbags are placed between the solid plane and the body, such as floor, chair back, bed, wall, etc. - Tighten the screws at the bottom of the pressure gauge (gently) and fill the three airbags with air until they can fill the body and the plane. - When air flows back into the tube, the initial reference pressure will decrease and increase before starting the movement. - Change the pressure of the body on one of the three airbags, and the pressure data on the instrument will also change. - The pressure of the air bag can be increased or decreased Or the pressure can be kept unchanged according to the requirements of action. - Release air by loosening the screw after exercise. Product contains: 1 dial 1 airbag 1 hose Note: 1. Due to different monitors and manual measurement methods, product color and size may have errors, please understand! 2. Assembly: Connect one end of the latex tube to the air inlet hole on the air bag, press the pressure valve with one hand, insert the tube head with the other hand, and then release the pressure valve. Connect the other end of the latex tube to the air outlet on the dial and insert it into the air outlet.?Core muscle group activation instrument?: It consists of a combination meter connected to a pressure sensor and an inflatable bulb, providing accurate and reliable feedback on joint protection and stabilization training. ?Effect?: With consistent and proper use, you can improve your of life by improving muscle function, reducing pain symptoms. ?Strengthen Core Muscles?: It allows users to activate deep muscles and improve posture, making it an essential tool for those seeking relief from lower back pain. ?Core Muscle Rehabilitation Instrument?: This designed to help prevent and treat low back and neck pain by promoting effective movement and improving core strength and stability. ?Biofeedback Device?: The Pressure Biofeedback Instrument is a to monitor body movements, particularly spinal movements, during exercise.