1.12 lead,small size, light weight recorder 2.High speed,accurate system software 3.Highly anti-jamming Advanced recorder1 ... .7. International standard electrode placements (10 electrodes/12-lead).8. Independent pacemaker detection channel with highest sampling ... SD memory card, lead-wires, pack CD of software, infrared adapter, encrypt lock (FDA approved),12 channel Ambulatory ECG System , holter ecg