semiconductor sensor inside
 warm-up time:within 10 seconds
 response time :within 5 seconds
 Operation temperature:5-40 ℃
 Torch function
 Key chain   SIZE : 75 40 25MM
 3 test steps with LED indication
 test result:
    Safety: under 0.02% BAC
    Caution: 0.02% - 0.05% BAC
    Danger: over 0.05% BAC