The Bright Basics Clip-On LED Hat Lamp clips onto any brim of a hat, cap, or pocket with 2 sturdy clips. This lamp has two separate and distinct lighting modes for steady light or a strobe light mode. It works on 2 CR2032 batteries, which are easy to change if they ever run out of power. With 5 separate LED bulbs in each clip, it provides the perfect amount of brightness. The 180° visibility of this hat lamp provides a wide enough beam for very dark scenarios like camping or blackouts, plus they are perfect for keeping around in case of emergency.