The ECG trunk cable is 2.7 m. Length of 3-lead and 5-lead wires: 0.8 m; length of 3-lead extender leads: 1 m; length of 5-lead extender leads: RA（R）、LA（L）、V（C）length is 1 m，RL（N）、LL（F）length is 1.4 m；The 12-lead limb lead length was 1.25 m and the 12-lead chest lead length was 1 m. ECG cables, lead wires, and adapter cables comply with the standard of ANSI/AAMI EC53 and IEC60601-1.