MD538 Sleep Bluetooth Headset Wireless Ear Conduction Non-in-ear Super Long Battery Life Bilateral Stereo Headset Features: Invisible Design & Ergonomics：Invisible earbuds are designed according to the shape of the ear, very mini design style, very light, fit the ear hook securely, suitable for long-term wear, will not cause discomfort to the ear. DESIGNED FOR SLEEPING:Very mini and invisible earbuds body design, if you like to sleep with earbuds and don't like the foreign body sensation in your ears when sleeping on your side, then these sleep earplugs are the for you. your side without squeezing your ears, and the U-shaped rubber skin-friendly ear caps make the earphones fit your ears all night. Operation:This hidden earbuds for work is very easy to use. With a built-in microphone, you can easily between pausing music, answering calls, rejecting calls, or tracking music with the of a finger without out your phone. All things become easier and easier SENSE- TO WEAR:These are the lightest earbuds,size within 1cm/0.4in weighing. It feels so light and natural, you hardly notice its presence DOUBLE NOISE CANCELLING TECHNOLOGY:Excellent physical noise cancelling combined with acoustic noise cancelling technology, you can enjoy a quiet sleep with sleeping earbuds. Stay away from snoring and baby noise. 24H LONG BATTERY LIFE & FAST CHARGING:The sleep earbuds last for 24 hours of listening to songs, and the stylish charging case can extend the usage to 480 hours, which means the charging case can provide 7 times for extra charging power for invisible earbuds. fast charging, it takes 10 minutes to charge and 91 minutes to listen to songs SOUND QUALITY & GUARANTEE:This sleeping earbus bring you audio enjoyment. cavity stereo surround sound, immersive music enjoyment. The sleep companion. If you encounter any problem in use, please feel to us, we will solve it for you within 25 hours. Bluetooth 5.3 and Fast Connection:High-quality 5. Bluetooth chipset invisible bluetooth earbuds provides high-speed and stable connection, signal, faster connection speed, almost all Bluetooth-enabled devices, up to 15 meters away. and fast connection, enter the music world within 2 seconds. Product Description: Product Specifications: Bluetooth Version: 5.3 Transmission Distance: about 15M Standby time：480 hours Charging Time: 1 hours with Charging Case: 24 hours Support system: all devices and mobile phones that support Bluetooth Package Includes: A Pair Invisible Sleep Wireless Earphone Ipx5 Notes: Due to manual measurements, please allow slight measurement deviations. Due to the different display and lighting effects, the actual color of the item may be slightly different from the color displayed in the picture.