FEATURES OF Contec TLC 9803 Holter ECG System With Advance Design And Technology. The Recorder Can Work Stably, Dependable And Durably. Be Provided With The Capability Of Anti-jamming And Aseismatic. Small Volume With Oled Screen. The Resolution Is 160#128. Be provided with functions of waveform preview, record review and event marketing. Accurate record of the start time of the data sampled owing to the real time clock of itself. Avoid damage owing to the repeating inserting and pulling out by using the inbuilt TFcard to storage the data. The maximum capability can be 2gb , so the original data can be saved perfectly by no compression. the average review time of single case can be less than 40 seconds by using interface of USB 2.0. Record waveform details inextenso by the design of high precision sampling frequency. Record the state of pacemaker exactly by higher sampling frequency. International standard of 12 leads , record 24-hour Drcg with the same standard of the ECG.