UNI-T UT18C Auto Range Voltage and Continuity Tester with LCD/LED Indication Date Hold RCD Test and No Battery Detection AC and DC voltage(including the three-phase alternating current)measurement, Auto Range, Auto stan Single pen measurement (can determine the zero line or wire), Polarity Detection,Silent Mode. Phase of three-phase AC power indicator,on-off test, RCD Test,self checking,Auto standby Check more specification in product description. FREE SHIPPING from China via ePacket, usually takes about 10-15 business days for the delivery