[Ground Resistance Tester] Zhengzhou company where? Product technical parameters? Phone number? [Product Description]: RK2678X Ground Resistance Tester (full display) main technical indicators: output current (AC): (5 ~ 30) A (AC) resistance measurement range: (0 ~ 600) mΩ Resistance Accuracy: ± ( 5% ± 3 digits) alarm range: (50 ~ 600) mΩ (continuous) time (sec): (0 ~ 99) S Zhengzhou City Department instrumentation firm Address: West Street, Erqi Place East Moon Star City, 19th Floor, A3 0371 -66,959,363 Contact: Du Jingli 13597018197 QQ; 1142689522 Website: http://www.huike17.com