1. Introduction and Overview
The BACtrack Go Keychain Breathalyzer is a compact and convenient device designed to provide quick and accurate estimations of your Blood Alcohol Content (BAC). It utilizes Advanced Micro Check alcohol sensor technology for reliable results, making it suitable for personal use to understand how alcohol affects your body.

Image: The BACtrack Go Keychain Breathalyzer, a compact white device with a digital display, attached to a keyring.
Key Features:
- Quick and Accurate BAC Estimation: Equipped with proprietary Advanced MicroCheck Sensor technology for reliable results.
- Easy One-Button Operation: Simple to power on and begin testing within seconds.
- Ultra-Portable Design: Its compact size allows it to fit easily in a pocket or purse, making it convenient for on-the-go use.
- Optimal Breath Capture: Features an innovative fold-out mouthpiece designed to ensure only your breath is sampled, minimizing interference from other airborne elements.

Image: The BACtrack Go Breathalyzer highlighting its quick and easy BAC estimation and Advanced MicroCheck Sensor technology.
2. Setup
What's in the Box:
- 1 x BACtrack Go Breathalyzer
- 3 x Breathalyzer Mouthpieces
- 1 x AAA Battery

Image: A visual representation of the items included in the BACtrack Go package: the breathalyzer, three mouthpieces, and a AAA battery.
Battery Installation:
- Locate the battery compartment on the back of the device.
- Slide open the battery cover.
- Insert one AAA battery, ensuring correct polarity (+/-).
- Close the battery cover securely.
The device requires one AAA battery for operation. Ensure the battery is inserted correctly for proper functionality.
3. Operating Instructions
For accurate results, it is crucial to wait at least 15 minutes after your last drink before performing a test. This allows alcohol to be absorbed from your mouth into your bloodstream, preventing false high readings from residual mouth alcohol.
- Power On: Press and hold the power button located on the side of the device until the display illuminates.
- Prepare for Test: The device will display "WAIT" and count down as it warms up. Once ready, it will display "BLOW".
- Perform Test: Extend the folding mouthpiece. Take a deep breath and blow steadily and continuously into the mouthpiece for approximately 5 seconds until you hear a beep or the device indicates completion.
- View Results: Your estimated Blood Alcohol Content (BAC) will be displayed on the screen within seconds.

Image: A user demonstrating how to blow into the BACtrack Go Breathalyzer, emphasizing its portability.

Image: The BACtrack Go Breathalyzer promoting responsible alcohol consumption.
4. Maintenance
Recalibration:
All breathalyzers, including BACtrack devices, require periodic recalibration to maintain accuracy. The frequency of recalibration depends on usage. Refer to the official BACtrack website or the full user manual (PDF link provided below) for detailed recalibration instructions and service options.
Cleaning:
To clean the exterior of the device, use a soft, damp cloth. Do not use abrasive cleaners or immerse the device in water. The mouthpieces can be cleaned with mild soap and water, then air-dried completely before re-use.
5. Troubleshooting
If you encounter issues with your BACtrack Go Breathalyzer, please refer to the following common troubleshooting steps:
- Device Not Powering On: Ensure the AAA battery is correctly installed and has sufficient charge. Replace the battery if necessary.
- Inaccurate Readings: Ensure you have waited at least 15 minutes after your last drink before testing. Residual mouth alcohol can lead to inflated readings. Also, ensure you are blowing steadily and continuously as instructed.
- "FLOW" or "ERR" Message: This may indicate an insufficient breath sample. Try blowing longer and more consistently.
- Device Requires Recalibration: If readings seem consistently off or the device indicates a need for service, it may require recalibration.
For more detailed troubleshooting or persistent issues, please consult the full user manual available as a PDF or contact BACtrack customer support.
6. Specifications
| Feature | Detail |
|---|---|
| Model Number | BT-KC20 |
| Product Dimensions | 1.45 x 0.55 x 2.4 inches |
| Item Weight | 2.08 ounces |
| Battery Type | 1 AAA battery (included) |
| Sensor Technology | Advanced MicroCheck Sensor |
| Response Time | 5 Seconds |
| First Available Date | July 16, 2014 |
7. Warranty and Support
For warranty information, product support, or to inquire about recalibration services (additional charges may apply), please visit the official BACtrack website or contact their customer service department.
Official BACtrack Store: BACtrack Store on Amazon
User Manual (PDF): Download PDF
8. Legal Disclaimer
All breathalyzers, including BACtrack devices, require periodic recalibration to maintain accuracy. See product manual for more information. Additional charges apply.





