HDE Waterproof LED Cycling Lights Bicycle Handlebar Headlight & Red Flashing Tail Light Increase your safety while riding at night or any time of day with these easy to install waterproof bike lights Includes two operating modes: Steady or Flashing. These modes change by pressing the button ontop of the white head light Batteries are needed to operate these lights: 4 x AAA batteries for the White Head Light; 2 x AAA batteries for the Red Taillight Easily mounts to handlebars or seat so other riders or cars can clearly see you in the dark Reflectors may work but not the way these ultra bright LEDs do; Assure yours or your kids safe biking and exercising