• Headlamp Powered by USB,This clip on Hat Light allows you to work hands-free under the darkest conditions.The work light adopts the latest battery power indicator design,so you can check the battery power at any time.The LED Cap Light allows you to easily add light to any hat or cap when you need light but don't want a traditional headlamp.The clip-on our cap light is contoured to fit securely onto the visor of your