1) designed for 4-5 persons 2) voltage:110v 0r 220v 3) Removable high quality infrared heater system 4) dome light with brightness adjustable 5) floor and ceiling vent for air circulation 6) comfortable backrest and bench seating 7) CD player with Radio(stereophonic) 8) Digital temperature and time control panel inside and outside 9) Temper glass window(s) on doors 10) Low operating cost