Handy Keychain Breathalyzer (Blood Alcohol Level Tester) Drive Safe Limit Beer Wine Safe - Singapore Seller 

- Tri-stage LED Display: 0.00~0.02% BAC (Ok), 0.02~0.05% BAC (Low), 0.05%+ BAC (Exceeded Limit)
- Built-in Red LED Search Light
- Powered by 2 x AAA batteries (sold separately)