Hiho BAC Smartphone Keychain Breathalyzer for Apple Iphone Instruction and App download search "ibreathalyzer mini" in Apple store Plugs into your phones earplug jack so there's no wasting battery with bluetooth Hiho's free app works with iphone or android. Tracks BAC result history along with photos, comments Connects with your phones GPS so your friends can see instantly where your at if you need a ride Preprogrammed contact numbers for taxi or friends