F-800 bright LED 800 lumens max output; r-75 comb bright LED 75 lumens max output 24 hours of runtime on economic flash mode (f-800); 10 hours of runtime on economic flash mode (r-75 comb); USB rechargeable internal lithium Ion battery F-800 has 6 modes; high steady, medium steady, low steady, daytime Pulse, nighttime Pulse, economic flash; r-75 comb has 6 modes; high flash, medium steady, low steady, daytime Pulse, nighttime Pulse, economic flash Multi-fit quick release system allows for tool-free mounting on handle bars, seat posts, or frame tubes Two year limited