The Bright Basics Clip-On LED Hat Lights clip onto any brim of a hat/cap/pocket with two sturdy clips. Two separate and distinct lighting modes for steady light or for a strobe light mode. Works on two included CR2032 batteries, easy to change them if they ever run out on you. Includes 5 separate LED bulbs in each clip so there's always plenty of light. Offers 180 degree visibility so the beams are wide enough for very dark scenarios like camping or blackouts and are perfect to keep around in case of emergency.