Features:
Advanced NM Hot-wire alcohol sensor
quick response,excellent accuracy
Smart MCU control
Direct Testing process LCD Indication 
LCD Indication, Backup Lamp.
Portable design
No touch health design
Visuable and audio warning beyond pre-set limit
Power saving design,low battery indication
Specification:
Hot-Wire alcohol sensor
Detecting Range:0.000-0.20BAC%(0.00-1.00mg/L)(0.00-2.00g/L)
Accuracy:±10% at 0.05%BAC(±5% at 0.24mg/L)(±10% at 0.5mg/L)
Warm-up Time:<18sec
Testing Time:<8sec
Display:3 Digital LCD
Power:3VDC(2XAAA batteries)
Conditions: 0° -- 45° <=95%RH no Condesation