... .new fashional than others 3.Industrial telephone :IP67 4.EX 1 Application 1.1 The hazardous location of ... 1A 2B IIC* 1.3 temperature group ,T1-T61.4 Ambient temperature,-30 ~ +501.5 degreeRelative humidity, ≤95% ... ,check details at our homepage 2.3 Operating voltage ,AC220V±15%,50Hz2.4 operating current , 50mA,≤0.2A. 2.5 ... quantity of the telephones in a system. 3.4 It is very easy to be installed and be ...