Features: 100% brand new and high quality Bluetooth-compatible connection by smartphone programmable, free app support for mobile phone, very simple and convenient. Download the "Magic Display" APP. The hat connects to the phone via Bluetooth-compatibletooth, see a lot of features in the APP. Cool hats with LED light beads, text shows, drawing, animation, and music equalizer. Let you be the focus in the crowd with. Great for concerts, rave festivals, bars, clubs, electric glow run, LED parties, Halloween, costume parties, Christmas, carnivals, etc. USB chargeable: please charge it first, then turn on and use it. 1 baseball cap&usb cable only, other accessories demo in the picture are not included Specification: Material: Cotton Blend Charging Mode: Micro USB Support system: mobile phone Head circumference: 56-60cm(22.05-23.62in) Optional Color: A Red(with Bluetooth), B Black(with Bluetooth), C Red(no bluetooth), D Black(no bluetooth) Quantity: 1 pc Warm prompt: 1.Asian people size is 1 or 2 sizes smaller than European and American. 2.Please note that low temperature washed,do not bleach and place under the blazing sun for quite a long time. 3.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 4.Because of different monitors and lamplight,the picture may not reflect the actual color of the item,really thank you for your kind understanding Package includes: 1 x Baseball Hat 1 x USB Charging Cable(without retail package)