Thank you very much for viewing! The product may have been opened for inspection. We appreciate your understanding and cooperation! 【Bluetooth 5.1 Technology & Canal-Type Earphones】 These Bluetooth earphones support the latest Bluetooth version 5.1, making them less susceptible to radio interference between your smartphone and the earphones, reducing the risk of sound interruption. They provide stable wireless communication even on trains and in stations. Also, they are canal-type earphones, which are inserted into the ear. They fit snugly in the ear canal, allowing sound to reach deeply, making them suitable for enjoying deep bass, and they also have high sound insulation, so you don't have to worry about sound leakage. Three sizes of ear tips are included, so you can choose the size of the ear tips to match your ear size and adjust them to your preferred fit. 【Noise Reduction & Truly Wireless】 By incorporating the CVC8.0 noise-canceling function, ambient noise is instantly cut off, and silence arrives. 【Hi-Fi High Sound Quality & IPX7 Waterproof】 These truly wireless earphones are equipped with an 8mm driver with a 3-layer structure that enhances the output of both high and low frequencies, realizing powerful sound. 【30 Hours of Music Playback & Automatic Pairing】 These truly wireless earphones can continuously play music for up to 5 hours, and with the charging case, they can be used for up to 30 hours. This Bluetooth earphone automatically turns on and enters pairing mode when you take the earphones out of the charging case, making it a latest model that is easy to use even for beginners. The earphones automatically remember the smartphone that was connected once, and for the second and subsequent pairings, the earphones automatically connect to the device instantly when you take them out. When you put the earphones back in the charging case, they automatically turn off and enter charging mode. 【2021 Version Bluetooth 5.1】Bluetooth Earphones Wireless Earphones 30 Hours Continuous Playback Hi-Fi AAC Codec Compatible IPX7 Waterproof Bluetooth Earphones Automatic Pairing Touch Easy Operation CVC8.0 Noise Canceling Hands-Free Calling Built-in Microphone Single Ear/Dual Ear Mode Siri Compatible Left/Right Separate Compact iOS/Android Compatible (White)