Alcohol Tester Fuel Cell Alcohol Tester AA2020 1. Display: 1.5” color display 2. Keyboard: 3 keys operation:  “up” , “dn” & “ok” 3. Power supply: 1 * AA rechargeable battery  (3.7V 700mAh) 4. ADC: 12bit 3.3V 5. Mouth piece: auto trigger blow tube 6. Auto flow monitoring: auto flow 7. Sampling system: DC 26V 0.2A 8. Storage condition: temperature: -20°C to +70°C. 9. Operating temperature: from 5°C to +50°C, for optimum operation 10. RTC: 12/24 hours format 11. Memories: 2000 records with time stamp 12. Temp.: +/- 0.5°C at room temp. 13. Printer interface: RS232 or BT (optional) 13. Printer (not included): pin dot matrix or thermal 14. Indicator: Instructing LED for indication 14. Dimension: about 123 * 63 * 20mm 15. Measurement accuracy: ±0.04mg/L (±0.08%) at alert point Drift: typically <1.0 % of the measurement value/month 16. Standard packing: including gift box, 4pcs blow tubes, USB cable for charging 17. Optional packing/accessory: metal case, mouthpiece, rechargeable 14500 battery