ST602 is the most economical model. It is the same pressure as other models and it's suitable for 1 people only. Small occupation of room, light and practical. Key Features:1.3ATA, 30kPa, 4psi portable mild hyperbaric chamberEasy Operation - One people can operate it without assistance.2 transparent viewing side windows.Delivers 93% oxygen under pressure via an oxygen headset/facial mask.Accomodate 1 people.Internal Pressure Gauge - The user can observe the pressure while inside the chamber.Seams are heat welded - No toxic glues are used.Unique 2 zipper seal for oxygen leak prevention.Internal steel frame - Hold the shape when not in use.Fast shipping to your door, by FedEx or DHL Express.SPECIFICATIONS OF ST602 HYPERBARIC OXYGEN CHAMBER HYPERBARIC CHAMBERSIZELength*Diameter: 225x60CM/89x24INCHPRESSURE1.3ATA, 4PSI, 30KPAWEIGHT11KgFEATURE*HIGH STRENGTH MATERIAL      *NON-TOXIC/ECO-FRIENDLY      *PORTABLE/FOLADABLE      *SAFE/ONE-MAN OPERATION OIL FREE AIR COMPRESSOR SIZEL*W*H: 39X24X26CMWEIGHT18KgFEATURE*OIL FREE TYPE      *NON-TOXIC/ECO-FRIENDLY      *QUIET      *SUPER ADSORPTION ACTIVATED FILTERS      *DOUBLE INLET AND OUTLET FILTERS OXYGEN CONCENTRATORSIZEL*W*H:38X26X47CMWEIGHT27KgOXYGEN PURITY≥90%FEATURE*PSA MOLECULAR SIEVE HIGH TECHOLOGY      *NON-TOXIC/NON-CHEMICAL/ECO-FRIENDLY      *CONTINUOUS OXYGEN PRODUCTION, NO NEED OXYGEN TANK