1. What you will get: The package comes with 4 hands-free LED clips on the cap light; moreover, enough quantity can meet your needs of use and replacement in your daily life, allowing you to work, read, ride anytime, anywhere and explore.2. Super bright: Each cap light has 11 bright LED bulbs, which can provide a maximum of 400 lumens to illuminate your dark environment; and there is a one-button power button for easy on/off operation, simple operation, use 3 sections AAA batteries (not included) make the cap headlight easy to replace; and, with higher brightness and longer life, this clip-on headlight can last up to 24 hours of working time3.Easy to install: This clip-on headlight is very easy to use, you just need to clip it on the hat/cap/pocket with a sturdy buckle to completely free your hands and let you focus on your workLightweight Design: The size of the LED cap light is approx. 3.4 x 2.2 x 0.5 inches / 8.7 x 5.6 x 1.2 cm, it weighs less than an ounce, it will not be any burden when clipped on the hat, easy to use and practical, a good helper in life4. Wide range of application: This clip-on headlight is ideal for close work and long-distance viewing, and can meet the basic brightness needs of indoor or outdoor activities; in addition, the clip-on headlight is designed for reading, dog walking, fishing, night running , reading, camping, hiking, jogging, emergencies, etc.