Battery: Li-battery, 200mAh.(Built-in) Unit: G/L% BAC. Indicator color: Green, orange, red. Test range: 0.00%-0.19% BAC & 0.0-1.9 g/L How to Use:1. Press and hold the power button for 1 second, the alcohol tester LCD with turn on with one beep sound. 2. Warm-up mode countdown for 10 seconds. 3. Testing mode countdown from 10 to 00 after warm-up mode, blow at this period. 4. Blow into the breath inhaler for 3-5 seconds with normal power after a deep inhalation. 5. Read the test result from the alcohol tester LCD. 6. Test range: 0.00%-0.19% BAC & 0.0-1.9 g/L Notes: 1. The first use of the tester or after a long time no use, press the power button and retry several times if possible. 2. Repeatedly 2 or 3 times to obtain more accurate results. 3. Do not smoke and eat for 20 minutes prior to testing. 4. The test result is for reference only. 5. Rechargeable with USB cable Colour:As Shown Material:plastic Package Contents: 1 x Alcohol Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.