1. In-built sidestream handheld monitor, thickness is only 2.4cm. 2. Original Etco2 module manufacturer 3. 4 inch touch screen 4. 16Gb SD card, mass storage 5. Auto-brightness screen 6. USB data reading and USB charging 7. all-in-one sampling line 8. Status indicator 9.PR:range:30-350BPM 10. 6-21 hours long-term battery support 11. ETCO2 sensor professional manufacturer 12. Can choose Medical / Veterinary