There is no more accurate personal alcohol tester available than the LifeGuard. Wherever and whenever there is the need for personal breath alcohol content (BAC) measurement, LifeGuard is the one to trust.
Lifeguard combines precision fuel cell technology, ease of use and reliability into a consumer breathalyzer that stands above all others in personal use and in testing those you care about.
The LifeGuard comes complete with a permanent (fold-away) mouthpiece, 10 disposable (slip-on) mouthpieces, 9V battery, wrist strap, hard carry case, nylon carry pouch, operations manual, and one year warranty.. 
Advanced Features for Serious Users 
Simple two button operation 
Precise 3 digit BAC readout 
Platinum Fuel Cell for accuracy and reliability 
Last test result recall 
Law enforcement grade accuracy 
Dual Mode Mouthpiece System: 
Permanent (fold-away) mouthpiece for self testing 
Detachable (slip-on) mouthpieces for testing others 
Smart Alerts: 
Easy to understand visual icons 
English language user prompts 
Alcohol breath graph indicator 
Audible test sequence indicators 
Re-calibration reminder 
Real time battery power status 
Auto power-off 
Long battery life (9volt size) 
Fast warm-up, test time and recovery time 
64 X 128 character LCD 
Tough ABS 
American designed and manufactured 
FDA approved 
Hard Plastic Carry Case