B-099N New alcohol tester 4-In-1 functions (4 sections of switch)

LED will change to Red if the alcohol content exceeds 0.25mg/l after blowing into mouthpieces abut 5 seconds. UV LED is useful for checking the fluorescence fibril of currency and for authenticating banking/credit cards. the array of 5 white LED's will emit a strong illumination. the ultrasonic sound wave will repel mosquitoes within a 2 meter radius.