SODIAL(R) Bicycle Waterproof Silicone Light Flashing Light Lamp Head Rear Light Flashlight with Double LED (2-led) (Black Silicone, White LED) Condition: 100% New Material: Silicone Size: Approx:6cmx3.8cm(2 3/8"x1 4/8") Note: 2 x 3V CR2032 Batteries