Features 1.One size fits most: led tie Adjustable neck length fits most sizes. Use the shoulder strap slider to adjust the neck length. Minimum neck circumference - 10 3/4 inches / Maximum neck circumference - 18 1/2 inches. LED Braces: Width: 1" (2.5cm), Length: up to 46"; Fully adjustable garter belt length size with an elastic slider on the piece that connects to the back of your pants 2.LED Tie: The light controller requires 1 AAA batteryBatteries not included and has 3 settings: Full On, Blink, Off; The battery lasts 12 hours. The mini battery pack has Velcro and adhesive backing intended to attach to the bottom of your shirt collar or inside your shirt to hide it while you wear it. 5.Material: These costume accessories are made of dacron, durable and sturdy material, safe and reliable, providing a long time use 6.Perfect for concerts, rave festivals, bars, clubs, electric racing, LED parties, Halloween, masquerade parties, Mardi Gras, carnivals, gifts and moreProducts from He Wei 's store