Models1 alarm to hostgsm unobstructed effective range mindoor open area wireless zones60 wired zones2 lcd displayy sms phone numbers5 alarm to user phone numbers5 sound recordingyes alarmdisalarm typephone sms local alarm sound scale dbm70 output power supply v12 power supply typecharger direct built in li battery battery working time hours10 operating humidity rh80 power supply v3 quiescent current ua35 transmitting current ma19 battery life