1.wireless transmission 2.easy installation 3.working at free frequency 4.high quality,competitive price The main technical index of BW7001, the working environmentTemperature: -20 °C ~ +60 °C.Humidity: ≤ 95% RH.Altitude ≤ 3000m2, the electrical parametersWorking power supply: AC220V (± 10%), frequency of 50/60Hz.Dielectric strength: ≥ AC3000V.Insulation performance: ≥ 100MΩ.Power consumption: ≤ ...