Modelkl t03 alarm to hostpstn receiving frequency433mhz wireless zonessupport 50 pieces of wireless detectors 8 pieces of remote controllers alarm to user phone numbers6 sound recordingyes alarmdisalarm typephone wireless keyboard local alarm sound scale dbm120 output power supply v12 power supply typebuilt in li battery battery working time hoursabout 8 hours operating humidity rhless than 95 rh no congelation power supply v9 battery life year1