- Actually works well! Very useful and required when drinking and need to know if can drive.
- There are 3 lights: for under 0.02%, between 0.02% and 0.05%, and 0.05% and above - which is the legal limit for driving in many countries - so it's relevant.
- Easy to use and uses standard 2 AAA batteries.
- Comes with key-chain. So you can connect it to ... Read more
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