【High Visibility Reflective Headband】The 360 °reflective black headband headphones is made of high quality reflective material, which can effectively reflect the light from the street lamps or headlights, so that you can be seen more easily in the dark. 【Outoor Reflective Gear】This bluetooth headphones headband is designed for outdoor activities, lightweight and portable. The unique reflective material can improve visibility in low-light outdoor environments, especially suitable for running, cycling, hiking and other types of outdoor activities. 【Newest Bluetooth 5.4】Bluetooth 5.4 wireless headphones delay is reduced to 30 milliseconds, the coverage area is expanded to 15M, which can realize more efficient data transmission with lower power consumption. It can realize more stable and fast connection, and can reconnect within 1 ms under ideal conditions. 【Enjoy Music while Exercising】The Cooling Headband adopts a new blended technology to enhance the elasticity of the headband. Arc curve design, solidly fit your head, prevent the headband from slipping, can keep forehead dry and cool, so you can stay focused during exercise. 【High Elastic Nonslip Womens Mens Headband】 The Cooling Headband adopts a new blended technology to enhance the elasticity of the headband. Arc curve design, solidly fit your head, prevent the headband from slipping, can keep forehead dry and cool, so you can stay focused during exercise.