Comprehensive Alcohol Testing Device This Breathalyzer includes an alcohol sensor and a builtin rechargeable polymer lithium battery, allowing you to perform up to 300 tests on a single charge with reliable and consistent performance. Userfriendly LCD Display Features an LED digital display for easy reading. It provides clear alcohol measurement values, making it simple to assess your sobriety at a glance. Quick Check and Automatic Detection Designed for efficiency, it offers both quick check and automatic detection modes, delivering fast results in less than 5 seconds after blowing into the device. Use scenarios Before driving or operating machinery: use to verify that your alcohol level is within a safe range before resuming driving or work that requires full attention and coordination. After social events or gatherings: check sobriety promptly to decide if you are fit to drive or if additional coolingoff time is needed. Home or small team safety checks: convenient for family use or small workplaces to help enforce safety protocols and compliance monitoring.