The BACtrack Vio smartphone breathalyzer is the smallest and simplest way to turn nearly any smartphone into a high-performance alcohol screening device. Simply open the flip-up mouthpiece, blow for 5 seconds and voila, you have an ultra-accurate BAC reading right on your smartphone.

It’s even better when it’s 20% cheaper! Get yours now from Cult of Android Deals for just $39.99.

• Slip the compact BACtrack Vio into your pocket or use as keychain
• Bluetooth connectivity to wirelessly sync with the free BACtrack app
• ZeroLine® Technology gets an accurate read on when your BAC will return to 0.00%
• Sanitary flip-up mouthpiece keeps germs and impurities out
• Advanced MicroCheck® Sensors to ensure accurate readings
• “Guess your BAC” feature

The BACtrack Vio smartphone breathalyzer is normally priced at $50, but for a limited time only, you can get yours from Cult of Android Deals for just $39.99.