Powered by BACtrack's proprietary BluFire® fuel cell sensor technology, the ultra-compact BACtrack C8 quickly and easily estimates your alcohol level, with professional-grade accuracy. BACtrack's patented ZeroLine® technology can even tell you when your BAC will return to 0.00%, empowering you to make better decisions while drinking. Perfect for any social situation, from happy hour to dinner parties, the tiny BACtrack C8 personal breathalyzer will raise your drinking IQ, helping you and your friends drink smarter.