... indicating light; V1,V3,V5 leads mensuring for Physical examination, time-saving, paper-saving, convenient; Hidden handle. G.MEAS: ... Digitized; Select simultaneously acquisition of 12-lead ECG signals; Powerful anti-interference with variety of filtering methods: DFT, AC,EMG, Lowpass ... a lead failed, which guides doctors operating extremely convenient, time-safing and avoids wasting of paper; V1,V3,V5 ...