iDaye Set of 2 Super Bright Bike Lights,1 Rear light and 1 Front Light for Safety - Fits all sized Handlebars and Installs in Seconds!- 3 kinds of settings:full light,flash,slow flash (2 pcs black) Fits any handbars even oversize,and easy to install! Solid, Durable, Extend Strong. 3 Kinds of Switch:Full light, Flash, Slow Flash. 2 CR2032 Wafer Batteries Power 2 LED Lights Between 50 and 150 Hours - Easily Replaceable! Packange:2 * black light