The NEBO Twin Pucks feature a task light and an emergency beacon all-in-one. Both lights attach magneticallhy to each other, but can also operate independently and are separately powered. The task light provides hands-free lighting in three diffectent ways: 180 degree adjustable stand, hanging hole or magnetic base. The emergency beacon works perfectly for roadzide hazard light. Perfect gift for the car. 3.36" in diameter OUTPUT: --White light - 3 light modes: -High (160 lumen) for 10 hours. -Medium (80 lumens) for 20 hours--Low (10 lumens) 48 hours. --Red light - 5 modes -Rotating Flash: 38 hours -8 LEDs steady on: 7.5 hours -8 LEDs flash: 27 hours -8 LEDs S.O.S: 7.5 hours -4 LEDs steady on: 17.5 hours. White light powered by 3 readily available AAA batteries (included). Red light powered by 2 readily available AAA batteries (included) PRC