... Practical! 3.With continuity test! HD90A is 3 1/2 digital clamp meter with steady performance,safety and reliability, full function. The ... molding is more beautiful and convenient operation. The instrument applies high-performance A/D transformer, all the components are SMD surfaced ... not easy to damage. AC current is measured through the clamp jaw with four positions of 2000mA,20A,200A,600A,the ...