Ultra HD headlamp produces 530 lumens of light & has multiple feature modes including spot mode & chip on board mode. Two UV lights allow you to detect counterfeit currency, blood, urine & special markings on driver's licenses. Elastic headband is adjustable to provide a firm, comfortable fit on most users. Push-button switch allows you to quickly operate the light with just the push of a button. Water-resistant headlamp with included AAA batteries provides up to 2 hours of runtime.