Wear it on a costume and everyone will admire. Trick out your body with electroluminescent wire. To activate your EL Wire Light, click the button on the battery pack. Set your Light Up Wire to a still light, a fast flash or a slow blink. Battery pack comes with clip for easy hiding & comfortable wearing. El String- Length: 40.0 in. - Width: .12 in. - Battery Pack - Height: 1.25 in. - Width: 3.50 in. - LED Colors: Blue - Batteries: Include 3 replaceable AG13 Batteries. - Weight: 0.19 LB