Features 1Healthier and more hygienicThis blood alcohol meter does not require lip contact, just blow it directly into the mouthpiece. Dust-proof design, press the switch, blow directly into the tester, without lips, without touching the breathalyzer. 2AUDIO ALERT & LCD DISPLAYWith LCD display, you can see the result clearly and remind you with 3 colors whether the alcohol test result is safe or not. Green is safe, yellow is warning, and red is dangerous. If the measured value is at or above the alarm concentration, the breathalyzer will turn on a red light and simultaneously emit a rapid beep. 3USB Rechargeable and DurableThe alcohol tester can be charged with a USB cable. Compared with regular AA batteries, it is easy to charge and environmentally friendly. USB charging can be charged through a mobile phone charger or a computer USB port. When no operation is performed, the breathalyzer will turn off to save power. 4Portable Mini RespiratorPortable respirator respirator mini size, small size, easy to carry, can fit into pocket or purse or other small spaces, perfect for weddings, parties, celebrations and other social events. 5Font AccuracyBlow 5-10 seconds, the result is ready in seconds and displayed on the LED screen for 10 seconds. Specification Size: 82.4*24mm Sensor type: Semiconductor type sensor Display: LCD liquid crystal display (black and white) Shell material: ABS plastic Test range: 0.00-0.19%BAC(0-1.9g/l) Measurement unit: g/l; mg/ml (BAC) Measurement mode: quick check, automatic detection Measurement time: 20 seconds Power supply mode: built-in rechargeable polymer lithium battery Using battery: 3.7V 140MAH can be tested 150 times continuously Power adapter requirements: DC5V 1A Working temperature: 0-45 Warm-up time: 10 seconds Blowing time: within 10 seconds, more than 4 seconds required Response time: less than 5 seconds Working current: 250MA (max) Standby current: less than 20UA Package List 1*Host 1*Charging cable 1*Instruction