Invisible earplugs are designed according to the shape of the ear, very miniature design, very light, fit securely in the ear hook, suitable for long-term wear, will not cause ear discomfort. Very miniature and invisible earplugs, if you like to sleep with earplugs and don't like the feeling of a foreign object in your ears when sleeping on your side, then these sleep earplugs are the best for you. Sleep on your side without squeezing your ears, and the U-shaped rubber band-friendly earplugs ensure the headphones stay in your ears all night. These hidden headphones for work are very easy to use. With a built-in microphone, you can easily switch between pausing music, answering calls, rejecting calls, or tracking music with a touch of a finger without taking out your phone. Everything becomes simpler and easier. FEEL-FREE TO WEAR These are the lightest headphones, size within 1 cm/0.4 inches and weighing only 0.08 oz per sleep earplug. It feels so light and natural, you barely notice they are there. DUAL NOISE REDUCTION TECHNOLOGY Excellent physical noise reduction combined with acoustic noise reduction technology, you can enjoy a quiet sleep time with sleep earplugs. Stay away from snoring and baby noise. 24H LONG BATTERY LIFE & FAST CHARGING The sleep earplugs last for 24 hours of music listening, and the stylish charging case can extend the usage time to 480 hours, meaning the charging case can provide 7 times extra charging power for invisible headphones. Micro fast charging, it only takes 10 minutes to charge and 91 minutes to listen to music. PREMIUM SOUND QUALITY & SAFETY GUARANTEE These sleep earplugs provide you with a high-quality sound experience. Whale hole stereo surround sound, immersive music experience. The perfect sleep companion. If you encounter any problems during use, please do not hesitate to contact us, we will solve it for you within 25 hours. Bluetooth 5.3 and fast connection High-quality 5. Bluetooth chipset invisible Bluetooth headphones provide a fast and stable connection, stronger signal, faster connection speed, compatible with almost all Bluetooth-enabled devices, up to 15 meters away. Simple and fast connection, enter the world of music within 2 seconds. Specification: Bluetooth version: 5.3 Transmission distance: about 15M Standby time 480 hours Charging time: 1 hour Play time with charging case: 24 hours Supports systems: all devices and mobile phones that support Bluetooth. Notes: 1. Please read the user manual carefully before use. 2. If you receive a defective product or have any questions during use, please do not hesitate to contact us. Packing list: 1 * Wireless Mini Headphones 1 * USB Cable 1 * User Manual