... .Power supply: AC:100V~240V,50/60Hz DC: 7.4V, 3700 mAh rechargeable lithium battery Fuse Specification: 2 pcs φ5×20mm AC ... supply includes both AC/DC. This device includes built-in lithium polymer rechargeable battery. It can standby for 4 hours, print ... 1000 cases, which is easy for doctor review and statistic.7. Under the review mode, you can see the saved ECG ...