Highlight Features Recording: 3-channel ECG Optional SPO2* Compact size: 72 mm x 55 mm x 16 mm Operating time: Up to 7 days Sampling rate: Up to 1024 Hz/16 bit Storage medium: Removable SD card Data transfer: Hi-Speed USB, Card reader,Bluetooth®* Pacemaker detection: Yes Items with * are optional advanced functions. Features Compact Size, Light Weight 72mm × 55mm × 16mm Approx. 45 grams (battery not included) Fully Programmable, High Fidelity, Research Grade Performance Sample rate up to 1024 samples per second No data compression 8, 10, 12 or 16 bit resolution Patient Cable 7 wire patient cable (any 3 leads in V1~V6, or X, Y, Z) 5 wire patient cable (any 3 leads in V1~V6) 4 wire patient cable (I, II, III, RL)* 3 wire patient cable (I, II, III)* Lower Power Consumption Powered by single AAA battery 24h, 48h or 7 days of full disclosure Removable SD Card 2GB records up to 168 hours of 3-channel ECG Programmable Pacemaker Detection Real time detection and display of pacemaker pulse 24 Hours SPO2 Measurement Two sensors of forehead or finger Wireless Transmission* Visual confirmation of patient hook up Provides 3-channel ECG preview on PC Items with * are optional accessories or function.