Lightweight and compact clip-on strobe lightReplaceable Batteries included: 2 x 3V Lithium 2032Packed with 4 super bright LEDs16 Lumens to help you stay safeBuilt for all types of weather this strobe is IPX4Weather resistant so you can run, rain or shine50% ABS,40% (IC, PCB, LED, Resistor, Battery), 10% Silicon