Unisex Warm Winter Polyacrylonitrile Knit Hat Adult Head Cap with LED and Bluetooth (Grey)

1. LED lights and bluetooth devices are easy to disassemble and easy to clean hats.
2. How to use bluetooth: long press the bluetooth power button on mozi to turn on the phone, and BT-01 connection can be found in the bluetooth of the phone.
2. It is Very practical, it can be used for lighting, connecting to bluetooth, and keeping warm by wearing a hat.