Always drink responsibly with the DrinkMate Pocket Friendly Breathalyzer. Featuring a compact design, DrinkMate conveniently fits in your pocket to help you monitor your alcohol consumption on the go. Additionally, it simply plugs into your smartphone and launches the app when it times time for you to blow. By blowing into the end of the device, you can see your Blood Alcohol Content on the screen. In fact, you can even share your results with friends. There are two versions of DrinkMate available, depending on whether you use an Android or iOS device. Furthermore, both packages also come with a keychain carrying case. DrinkMate gets its power supply solely from your smartphone through either the Lightning or micro-USB port, depending on your device. Weighing just 0.2 ounces, DrinkMate is a must-have companion to ensure a safe and enjoyable night out.