The Azonic HossSulu USB Light Pair delivers powerful front and rear illumination for late night cruises through the city, daily commutes, and pitch dark singletrack rides. Its Hoss front light packs a whopping 400 lumens for super bright illumination on dark trails and desolate streets. The Hoss' Cree LED has two solid beam settings and two pulsingflashing settings. Its rechargeable USB battery goes from dead to fully charged in eight hours, lasting up to ten hours on its lowest pulsingflashing setting. The Sulu rear light keeps you visible when you're riding through traffic congested areas with its solid red and flashing settings. It features a rechargeable USB battery that charges in three hours flat and lasts up to five hours on its lowest pulsingflashing setting. Additionally, it comes with a universal rubber quick release for easy attachment to seat posts.