... power supply includes both AC/DC 3.CE Approved ECG600G Digital 3/6 Channel ECG Machine MODEL: ECG600G FeaturesInstructionsECG600G ... 60Hz DC: 7.4V, 3700 mAh rechargeable lithium battery Fuse Specification: 2 pcs φ5×20mm AC time ... ×6+1(rhythm lead),2×6,3×4,3×4+1(rhythm lead),4×3,4×3+1(rhythm lead),6×2,6× ... This device includes built-in lithium polymer rechargeable battery. It can standby for 4 hours, print ...