Thermo Therapy Dry Heat Unit w/40-50 Lbs. Celstim Thermo-therapy describes a process of granulated or ground cellulose - Celstim - particles being help in animated suspension by heated air blowing through a screen/filter and held captive by a housing and flexible velcro tightening sleeves * This process allows for a hand wrist foot ankle and on larger units the lower leg to be immersed in the Celstim medium * This treatment gently and warmly massages the extremities resulting in improved circulation faster wound healing and overall comfort * Models are all shipped with Celstim included and operating instructions * On all models the rear panel can be removed to facilitate the addition or removal of Celstim * TT202: Has additional sound-muffling *