Item specifics Condition New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read more about the condition Number of Earpieces Double Color Black MPN does not apply Year Manufactured 2020s Brand JKU Form Factor In-Ear Only Type Canal Earbud (In Ear Canal) Wireless Technology Bluetooth Manufacturer Warranty 2 Years Model TWS 381 Connectivity Bluetooth Features Active Noise Cancellation, Built-in Microphone, Noise Cancellation, Rechargeable Battery, Stereo, Surround Sound, Sweat-Proof, Touch Control, Water-Resistant, Waterproof, Wireless, to sleep Microphone Type Built-In Cable Length 0.8 m Country/Region of Manufacture Hong Kong UPC Does not apply Item description from the seller Specifications: Bluetooth version: 5.3 Transmission distance: about 15M. Standby time: 480 hours Charging time: 1 hour Playing time of charging box: 24 hours Support system: all Bluetooth-enabled devices and mobile phones. Product features: Invisible design and ergonomics: Invisible earplugs are designed according to the shape of the ear, with a very mini design style, which is very light and firmly fits the ear hook, suitable for long-term wear and will not cause discomfort to the ear. Designed for sleep: Very miniature and invisible earplug body design. If you like to sleep with earplugs and don't like foreign body sensation 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 skin-friendly ear cap makes the headphones fit your ears all night. Simple touch operation: this hidden working earplug is very easy to use. With the built-in microphone, you can easily switch between pausing music, answering a phone call, rejecting a phone call or tracking music with your finger without taking out your phone. Everything is getting easier and easier. Comfortable to wear: This is the lightest earplug, the size is less than 1 cm /0.4 inch, and each sleeping earplug weighs only 0.08 ounce. It feels so light and natural that you hardly notice it. Double noise reduction technology: excellent physical noise reduction technology combined with acoustic noise reduction technology, you can enjoy quiet sleep time with sleep headphones. Stay away from snoring and baby noise. 24-hour long battery life and fast charging: Sleeping headphones can listen to songs for 24 hours, and the fashionable charging box can extend the service time to 480 hours, which means that the charging box can provide 7 times of extra charging power for contact headphones. Micro fast charging, charging only takes 10 minutes, and listening to songs only takes 91 minutes. High-quality sound quality and safety guarantee: These sleeping earplugs bring you high-quality audio enjoyment. Whale cavity stereo surround sound, immersive music enjoyment. The perfect sleeping partner. If you encounter any problems in use, please feel free to contact us and we will solve them for you within 25 hours. Bluetooth 5.3 and fast connection: high quality 5. Bluetooth chipset stealth Bluetooth headset provides high-speed and stable connection, stronger signal and faster connection speed, which is compatible with almost all Bluetooth-enabled devices, up to 15 meters. Simple and fast connection, enter the music world in 2 seconds. Packaging includes: 1* Wireless Headphone ( double ) RH&LH 1*USB data cable Charging FREE SAME DAY SHIPPING FAST 1-3 DAY DELIVERY Limited quantity! 100% Satisfaction Guaranteed