Stay seen & safe with this versatile PBK light set. Offering up to 600-lumens & seven different settings, the front light can be tailored to a variety of light conditions with ease. It even offers ambient light sensing, which allows it to emit more light under drastic changes of light conditions, like going through a tunnel. Similarly, the rear light offers up to 50 lumens of light & seven modes to keep you seen to ongoing traffic. Both come with a durable outer casing which is resistant to water, making them a perfect choice for commuters. Each light also comes with a durable silicone strap too, allowing them to easily fit to a variety of handlebars & seat post shapes. Thankfully, they’re both rechargeable via micro USB (Universal Serial Bus) & contain around 20 hours of run time each. All this performance is packed into a neat package of just 88 grams per set. Front light 600-lumen maximum output Rear light 50-lumen maximum output Front light has ambient light sensing— brightness adjusts automatically to ambient light while in auto mode 20-hour maximum run time each 7 front & rear light modes – Low, high, flashing 1, flashing 2, flashing 3, flashing 4 & daytime flashing 88-grams per set. USB (Universal Serial Bus) rechargeable Water resistant design Easily adjustable silicone bracket Low battery indicator & battery protector