About this item 4 in 1, Free Your HandsSleep headphones, sleep headband, Bluetooth sleep masks, and Bluetooth sports headwear 4-in-1 make your exercise more relaxed and comfortable. The built-in microphone allows for answering and making calls, suitable for sports activities and side sleepers. Small size, multi-purposeWith a compact design, these sleep headphones are easy to carry around. They can also be used as a hair band, headband, and wrist guard during sports and leisure activities. Fashion and convenience all in one! Made of skin-friendly and comfortable fabric, this Bluetooth sleep mask is also washable, providing a comfortable feeling when worn. HIFI Binaural Stereo Sound EffectAdopting the latest Bluetooth technology, these sleep headphones ensure a stable connection with mobile phones, tablets, laptops, or PCs. The ultra-thin speakers produce high-fidelity stereo sound quality for a soft and comfortable music environment. Powerful battery life, ultra long standbyFeaturing a