1. GeneralDegree of protection: IP65,IP40,IP20(Buzzer); Standard: IEC/EN60947-5-12. Operating conditions2.1 Ambient temperature is -5℃~+40℃, the average temperature during 24 hours couldn't exceed +35℃.2.2 Altitude: ≤2000m.2.3 Atmosphere condition:Relative humidity of the atmosphere couldn&#