【2024 New Design Neckband Ear Cuff Earphones】Wireless Earphones Bluetooth 5.3 with Built-in Microphone, Open Ear Earphones, Leakage Prevention, Hi-Fi Sound Quality, Listen-While-Doing Earphones, Ultimate Fit, Type-C Fast Charging, Japanese Voice Guidance, Automatic Pairing, Ultra-Lightweight, Perfect for Gifts 【New Trend Bluetooth Earphones & Open Ear New Sensation】Perfectly combines the popular ear cuff earphones and neckband earphones, achieving an innovative design that leads the industry in 2024! Eliminates the discomfort and pressure caused by the vibrations of conventional bone conduction Bluetooth earphones, and also solves the problems of ear itching, stuffiness, and pain caused by long-term wear of conventional canal-type wireless earphones, as well as the easy-to-lose issues of completely wireless ear cuff earphones. Provides a stable and comfortable fit. 【Listen-While-Doing Earphones, More Freedom】The open-ear design allows you to enjoy music while listening to ambient sounds without blocking them out, even when wearing Bluetooth earphones. Perfect for outdoor sports, communication at work, and enjoying music while doing housework at home. 【Ultra-Lightweight Model】The earphone body is 24g, and each ear cuff is only 4g, making it ultra-lightweight and comfortable to wear for long periods. 【High-Quality Audio Experience】Without compromising on sound quality, these Bluetooth earphones are equipped with a 14mm large-diameter driver, providing a pure and natural music experience! You can capture the details of the music and enjoy a realistic sound effect. With 360° surround sound, you can feel like you're in the world of music! 【Up to 20 Hours of Playback, Enjoy Music All Day Long】Improves the problem of fast Bluetooth power consumption, these Bluetooth earphones have a built-in high-quality battery, upgraded low-energy consumption technology, and can be used continuously for up to 20 hours on a full charge. You can use them all day without worrying about the battery level, easily accommodating a full day's use, and they are your best partner from morning till night. Regarding the reliability issue, it has been used for about 1 hour. I haven't used it for a while, so I'm selling it as part of a decluttering effort. Thank you for your consideration.