Hãng sản xuất: SEW - Đài Loan Model: 1810 ELTaut Band movement.Simple operation.Wiring check. Robust.Can be used on 2 wires L-E (ELCB/RCCB/GFCI tester).Can be used on 3 wires L-E-N (with wiring check).No batteries required.Sense automatically 50 or ...