When you’re out on the town, you can’t always trust your instincts to know when you’ve had too much to drink. That’s when it’s time for the rechargeable iPhone Breathalyzer. Simply blow into the mouthpiece for five seconds and this compact, lightweight device sends your blood alcohol level (BAC) to your iPhone or iPad via Bluetooth. The iPhone Breathalyzer will estimate when your BAC will be back to zero.Track your results on a free app and you’ll gain a better understanding of how alcohol affects you. Compatible with iPhone 4S, iPhone 5, iPhone 5S, iPhone 5C, iPad 3, iPad Mini and iPod Touch 5.