Hats Wireless Music BT Hat LED Wireless Call Knitted Hat This warm knitted hat, cold proof and heat preservation, with LED lighting, suitable for fishing at night, outdoor riding, etc., can use BT music, wireless communication and other multi-function, advanced and convenient. Features: Fashionable appearance, suitable for men and women, cold proof and warm keeping. Rechargeable lithium battery design, easy to use, longer service life. The LED lamp is easy to disassemble and easy to cleans. You can use the button to control voice call, increase or decrease the volume, pause songs and other functions, convenient and quick. The effective receiving signal ranges is about 15 meters, and the telephone is clear. Compatible with most BT devices, easy to control and connect. Press the power button to select three different modes of light to meet the needs of users. Washing suggestion: washing temperature is below 40 â„?and hand washing. Do not machine wash, do not screw hard, do not dry clean, do not bleach. Specifications: Material: acrylic fiber Color: black Battery: 2V, 200mAh Item size: 195 * 220 * 200mm / 7.7 * 8.7 * 7.9in Item weight: 100g / 3.5ounce Package size: 100 * 50 * 50mm / 3.9 * 2.0 * 2.0in Package weight: 135g / 4.8ounce Packing List: 1 * Hat 1 * UBS Cable