... so on.Support 3 wired inputs (normally closed)and 16 wireless inputs, can easily connect detectors or sensors like PIR Sensors ... : 250*140*32mmStandard pack components 1 main panel, 1 wireless PIR detector, 1 wireless door sensor,1 siren, 2 remote controllers, 1 ... and 1 RF antenna ,1 power supply, 1 manual GSM alarm system with MMS&SMS function