... Current,≤50mA Alarm Current,≤300mA Wireless Receiving Frequency,315/433/868±0.5MHz Wireless Receiving Sensitivity,5mV/ m ... Humidity,≤90% Capacity for Wireless Device,28pcsSimple & practical auto-dial intruder alarm system with1. Auto-dial 6 ... 7. Can work with the wireless P.I.R sensor, wireless smoke detector, break sensor, gas sensor, and so on. 8. ... Simple & practical auto-dial intruder alarm system