KRY COMBO DUAL F-70/R-35 2-PK USB BLACKCombo pack of dual use lights that can be used as a 70 lumen headlight or a 35 lumen tail light Both LEDs include 5 modes, High steady, Low steady, Daylight pulse, Nitelight pulse and Economic Flash USB rechargeable no batteries to buy or replace Two lights in one Use white light for the front or switch to red for rear use Power saving function 10% power or less, lights will automatically switch to lowest lumen output Memory Function Lights turn on at