Accessories: Sure Lock Snap & Tab Electrode Adapter, 10/pk (5000-1917)Turns an off the shelf computer into a full functioning ECG. Connect it to a personal computer, laptop or tablet to acquire, store and analyze up to 12 channels of high resolution ECG data. Uses the Louvaine analysis program. Includes the Office Medic software, electrodes, electrode adapters and a lead placement guide. No batteries required because the power it drawn from the PC or tablet it is connected to by the USB port.