A. The invisible earplugs are designed according to the shape of the ear. They adopt a super-mini design style, are relatively lightweight, and can fit the ear hooks firmly. They are suitable for long-term wearing without causing significant discomfort to the ears. B. The earplug body is designed to be super-mini and less noticeable. If you like to wear earplugs to sleep and don't prefer the feeling of a foreign object in your ear when sleeping on your side, then these sleep earplugs could be a good choice for you. They won't put much pressure on your ears when you sleep on your side. The U-shaped rubber skin-friendly ear caps can help keep the earplugs fitting your ears throughout the night. C. These invisible earplugs for work are quite convenient to use. With a built-in microphone, you just need to tap your finger instead of taking out your phone to easily pause music, answer calls, reject incoming calls or switch tracks. It makes things easier. D. Wear without much feeling: These are relatively light earplugs, with a size within 1 centimeter (0.4 inches), and each sleep earplug only weighs 0.08 ounces. They feel very light and natural, and you can hardly be aware of their presence. E. Dual noise-reduction technology: The combination of physical noise reduction and acoustic noise-reduction technology. With these sleep earplugs, you can have a quieter sleeping time away from snoring and the noise of babies. F. Long battery life and fast charging: The sleep earplugs can play music for up to 24 hours. The stylish charging case can extend the usage time to 480 hours, which means the charging case can recharge the invisible earplugs several more times. Using micro fast-charging technology, just 10 minutes of charging allows about 91 minutes of music playback. G. Good sound and safety guarantee: These sleep earplugs can offer a decent audio experience, with a certain stereo surround sound effect, allowing you to get into the music. They can be good sleep companions. If you encounter any problems during use, please contact us at any time, and we will try to solve them for you within 25 hours. H. Bluetooth 5.3 and fast connection: The Bluetooth 5.3 chip in the invisible Bluetooth earplugs provides a relatively high-speed and stable connection, with a stronger signal and a faster connection speed. They are compatible with most Bluetooth-enabled devices, and the transmission distance can reach up to 15 meters. The connection is simple and fast, and you can enter the music world in a short time. I. Specification parameters: - Bluetooth version: 5.3 - Transmission distance: about 15 meters - Standby time: 480 hours - Charging time: 1 hour - Play time with the charging case: 24 hours - Supported systems: most Bluetooth-enabled devices and mobile phones J. Precautions: - Please read the instruction manual carefully before use. - If you receive a defective product or encounter any problems during use, please contact us at any time. K. Packaging list: - 1 pair of wireless mini earplugs - 1 USB data cable - 1 user manual