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 An opinion: 1. Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.?Versatile?This compact and easy-to-use device is perfect for your home gym, whether you are a fitness enthusiast or someone recovering from an injury, this biofeedback device can serve as a versatile trainer and coach to help you Achieve fitness goals. ?Biological pressure biofeedback device?This designed to help prevent low back and neck pain by promoting effective movement and improving core strength and stability. ?Activating deep core muscle groups?Use with exercises to protect and stabilize joints, prevent lower back and neck pain, improve core stability exercises, and enhance home exercise programs. ?Improve core Stability?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. ?Bio-Stress Feedback Instrument?Pressure biofeedback instruments are used to monitor body movements, specifically spinal movements, during exercise. Determine whether you are performing specific muscle exercises in the correct manner and form.