ThermoActive Back Support Electrode Lotions Gels Ultra powerful compressor for both humidification Color:Yellow Ultra powerful compressor for both humidification and High Flow High Pressure nebulization of viscous medications * Optimizes medication delivery by aerosolizing to a particle size of < 2 microns * Easy to read Pressure Gauge * 1 Year Limited Warranty 5 Lbs) * Weight capacity 250 lbs a patented removable gel pack that can either be frozen or heated depending on the use and a unique hand held pump that adjusts the level of compression * Fits circumference up to 46 as is or up to 66 with extension straps that are included * Indications: Lumbar injuries and strains Thoracic injuries and strains Post Surgical recovery back muscle soreness and spasms Sciatica SI Joint pain arthritis