Detail

Item No.: SL-BR007
LED: 3pcs Super bright Red LED 
Functions: Flash-chasing-steady-off
Waterproof Structure Design
Fit for seat post diameter 25.4-31.8mm  
Battery: 2xAAA
Lightweight, ultra-compact, weatherproof housing
Attaches to almost any bike via bike mounts and clip mount
1-mile visibility; runs for 100 hours on 2 AAA batteries