Kryptonite Street F-300 And Avenue R-30 Combo SetUSB rechargeable 300 lumen headlight and 30 lumen tail light combo pack Headlight has 6 modes , High steady, Medium steady, Low steady, Daylight pulse, Nitelight pulse and Economic Flash Tail light has 5 modes , High steady, Low steady, Daylight pulse, Nitelight pulse and Economic Flash Memory Function Light turns on at the last mode it was turned off Power saving function 10% power or less, lights will automatically switch to lowest lumen output