1) designed for 1 person, foldable,with flexible cloth cover,no need to install, occupy small space 2) voltage:110v 0r 220v, adjustable 3) quality certificate:available. 4) Removable high quality infrared heater system 5) floor vent for air circulation 6) comfortable backrest and bench seating 7) Digital temperature and time control panel inside and outside 8) Low operating cost 9) Easy to carry for indoor and outdoor use