... supply,AC 220V DC 9V Static Current,≤50mA Alarm Current,≤300mA Wireless Receiving Frequency,315/433/868± ... ,28pcsSimple & practical auto-dial intruder alarm system with1. Auto-dial 6 groups of alarm number automatically when the intruders appear ... P.I.R sensor, wireless smoke detector, break sensor, gas sensor, and so on. 8. Easy to use, ... can have it. Simple & practical auto-dial intruder alarm system