Products Specifications:1. Display: TFT 2 .4" TFT QVGA2. Keyboard: 3 Keys operation.3. Power supply: 4pcs AA Battery.4. Heat warm up: Chamber & Sensor warm up automatically.5. Auto Flow monitoring: Flow detect automatically.6. Test Mode: Quick Test or Passive Test.7. Long Term Storage condition: Temperature: O Degree C to +55 Degree C.Humidity: 30 to 90% RH8. Temperature: From -5 °C to + 50 °C. (5 Degree C to +40 Degree C for optimum operation)9. Data download: USB to PC Download records.10. Memories: 1,000 memories with ID & time stamp.11. Measurement Range and precision: 0.00-4.00 o/ooBAC or 0.00-2 .0mg/L (2000)± 0.08 %o at alert set point.Standard deviation: +/-0 .025 mg/L or +/-5 % of the measurementDrift: typically < 0 .8 % of the measurement value/month12. Printing: via Bluetooth to Portable printer (Printer Option to purchase).