2 PackElecrainbow 5-LED Handsfree Rotatable Hat Clip Light - Super Brightness & Lightweighted - 2 Modes with Updated Flicker Signal Light 2 Modes: Lighting & Newly Updated Flicker Signal Light 5 LED gives maximum 20 lumen brightness for walking,fishing at night 90 Degree Rotatable Head swivels up and down to the best viewing angel 4 x CR2032 Batteries Included; up to 8 Hours of Continuous Usage Install 2 set of CR2032 batteries in correct positions. (Note: The "+" and "-"are indicated inside the battery compartment)