Two 0.5 watt red LEDs by Nichia Brand Three modes: zZz, a-HA, Rock Steady and 10 percent power save function Up to 50 hours run time on 2x AAA batteries (included) Weatherproof exterior for all season riding Includes bracket for seatpost or seatstay mounting Weight: 45g Black/Red 3 Rear Not PublishedUPC/EAN/GTIN: 812938014109