We have tested and tested the Breath of Life to ensure scientific methods for appropriate psi suction and device functionality are appropriate. However, as an early adopter purchaser, you acknoweldge that despite our sincere and methodical efforts, sometimes malfunctions happen. Upon purchase, you acknowledge that malfunctions can happen and that in the event of a choking incident, you as the customer will continue to apply other choking relief methodologies such as: 1. Call 911 immediately. 2. Try utilizing back slaps and chest thrusts at least 3 times. 3. Alert as many people as possible for extra help. 4. After all options are exhausted and you have called emergency medical help, use the Breath of Life.