Dimensions: 1.73 in x 1.26 in x 1.26 in ( 4.4 cm x 3.2 cm x 3.2 cm Color: Black Quantity: 2 Features: Easily installed onto bikes Can be used as a bike safety light when attached on bikes 2-LED・ white lights Each powered by 2 x CR2032 battery ( included ) A pair per pack Feature: Mini・ easy to carry