Parece que, en lugar de decirte el día, te dice el grado de alcohol.

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Specification :
1) 3-step alcohol test;
2) Quick response and resume;
3) Torch (Orange LED);

Battery : Lithium batteries (3V)
Warm-up time : About 10 seconds
Response time : ≤ 5 seconds
Recovery time : ≤ 10 seconds
Scope test : 0.00 -- 0.11% BAC (12 o’clock of LED indicating for 0.00% BAC, the others showing the value of sequential analogy)
Accuracy : ± 0.01% BAC
Alarm range: ≥ 0.05% BAC sound alarm (alarm point setting)
Work environment: 10°C -- 40 °C
Temperature: 0°C -- 50 °C

Note:
0.00% BAC --- 0.01% BAC (between 12– 1 for safety range)
0.02% BAC --- 0.07% BAC (between 2 – 7 for after drink-driving range)
0.08% BAC --- 0.11% BAC (between 8 – 11 for drunk-driving )

Me da que no se van a vender muchos en el foro...