Features： 1、100,000 hours long life LED, 270 degree wide range viewing angle, visible effects at a distance of 20 meters, effectively guaranteeing riding safety. 2、Turning on the turn signal when the bicycle is turning can warn road vehicles and ensure riding safety. The effect of riding at night is better. 3、Press the white rubber lampshade to light up. There are two modes, namely always on and flashing. Shipped with built in battery. 4、Tighten the nut, flatten the rubber ball, and adjust the diameter. Then directly stuff them into the holes at both ends of the handlebar. 5、With a wide application range, the handlebar lights are suitable for handlebars with inner diameter of 16‑23mm pipe plug. Specification： Item Type: Bike Lights Material: Plastic Battery: 2 Button Batteries (Shipped with Built in Battery) Battery Model: LR1130 Battery Capacity: 65MAH Light: Red Fitment: Fit for Handlebars with a Pipe Plug Range of 16-23mm Inner Diameter Package List： 2 x Bike Lights