NAREENA'S ECG MACHINE SIX CHANNEL (Model No.: NLS-ECG 600D) Product Description: 12 Leads ECG Synchronous Sampling Systems, Thermal Printer with 110mm Print Paper, Synchronization Print 5.7" Colour Touch Screen, Both Push Button And Touch Operation... Product Features: Automatic Measurement, • Calculation, analysis, Waveform Freezing Support USB Flash Disk And SD Memory Patient Information Can Be Input Historical Data Can Be Reviewed And Printed Built In Rechargeable Lion Battery we can print up to 50 ECG waveform on Battery AC/DC Power Conversion Sleep Mode To Save Energy And Extend LCD Life Portable Design With Hidden Handle, Convent To Carry Lead Off And Lack Off Paper Detection Function 7level Printing Thick Can Be Chosen Adapt To 110-230v, 50/60hz AC Power Supply