Combination device with electrotherapy, ultrasound and laser (optional). The Combi 400 is a gymna product. The gymna product lines feature a range of therapeutic equipment and accessories, including active motion devices, cryotherpapy devices, and in this case electrotherapy devices. The Comb 400 can be used to monitor and analyze electrotherapy as well ultrasound procedures. Monitoring and analysis of laser therapy procedures is an optional Combi 400 feature.