Cygolite Streak 350 USB Rechargeable Bicycle Headlight & Tail Light Combo Set Powerful, USB rechargeable 350 Lumen headlight and 30 Lumen tail light combo set Exclusive night and day modes provide enhanced safety (headlight: 6 modes, tail light 6 modes) Steady Pulse alerts with pulses as its overlapping steady beam lights the night; daylighting's powerful flashes highlights your presence in day light Low battery indicator alerts you when a charge is needed; lightweight, water resistant design (headlight: 90 grams, tail light: 55 grams) Cygolite, the trusted American bicycle light experts since 1991