Description: The novel shape is small and compact, using 5 bright LEDs as the light source, the lighting effect is obvious, power saving, highlighting the fashion trend and technology atmosphere. The elliptical transparent lampshade is designed to be round and has a wide light emission. Waterproof design: The transparent lampshade is connected with the high-frequency sealing of the outer casing, which is not easy to fall off and is free from the erosion of rain. The push button switch is covered with expanded rubber, and it is safe and worry-free to ride on rainy days. Three-function design: Tap to enter, tap to shift: long-fast-flash-slow-off-off, to meet the needs of various riding for lighting. Specifications: Function: There are three modes of lighting: constant light mode, fast flash mode, slow flash mode Light source: 5 LED lights Battery: use 2 regular CR2032 electronics (already installed) Weight: 23g or so Net weight: 19g Dimensions: length 56mm * width 28mm * height 18mm Colour:As the picture show(optional) Material: ABS environmentally friendly materials Applicable: outdoor running, mountain climbing, cycling and other outdoor sports Battery installation: Use a Phillips screwdriver to unscrew th