1 high-flux Piranha Red LED and 2 super bright red LEDs provide better visibility than reflector alone.

Specifications
Lamp: 1 high-flux Piranha red LED and 2 super bright red LEDs
Battery: CR2032 x 2 (included)
Control / burn time (approx): 2 modes, 60 hr constant / 120 hr blinking
Light output: 8 cd
Lamp housing: Injection molded plastic
Mount: Topeak racks, seatpost (ø25.4 - ø31.8 mm)
Size: 5.5 x 4 x 2.2 cm / 2.2” x 1.6” x 0.9” (light)

Mfr Claimed Weight
32 g / 1.13 oz