BV Bicycle Light Set, Super Bright 5 LED Headlight and 3 LED Taillight, Quick-Release 5 LED headlight, tool-less bracket mount, over 40 foot range, quick-release mount, 4.1" x 1.3" x 1.3" 3 LED taillight, angle adjustable quick-release mount, 2.5" x 1.5" x 1" 2 mode headlight, 3 mode taillight Weather resistant Up to 80 hours, visible to motorists over 1500 feet away, 2 x AA, 2 x AAA (batteries not included)