Cheap And Discounts Genuine CONTEC 3 Channels ECG Holter, EKG Holter, Dynamic ECG Monitor System, 24 hours ECG Recorder TLC9803 Wholesale. Buy Directly From Merchant Contec Julee Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.