... Current,≤50mA Alarm Current,≤300mA Wireless Receiving Frequency,315/433/868±0.5MHz Wireless Receiving Sensitivity,5mV/ m Outer Alarm Siren Volume, ... ~40°C Humidity,≤90% Capacity for Wireless Device,28pcsSimple & practical auto-dial intruder alarm system with1. Auto-dial 6 groups ... the sudden alarm to prevent people from destroy. 7. Can work with the wireless P.I.R sensor, wireless smoke detector, ...