Neck strap and retractable design : Bluetooth earphones adopt an ergonomic neck strap design, which fits your neck and is comfortable to wear. The unique design of retractable earplugs allows you to pull the wires to the desired length and retract them when not in use. In addition, Bluetooth earphones designed with bright yellow silicone can effectively reduce the collision sound when the earplugs are retracted. Bluetooth 5.0 and Stereo This Bluetooth headset adopts advanced Bluetooth 5.0 technology, providing faster and stable signal connections. CVC noise reduction technology and built-in microphone are used for stereo sound and super bass sound, making calls clear and stable. You will love the wonderful music and clear call sound brought by these headphones. 16 hours of super long enjoyment : The neck strap Bluetooth earphone can provide 18 hours of talk time, 16 hours of music time, and 300 hours of standby time (fully charged time: 3.5 hours) with each charge. There is no need to worry about Bluetooth headphones running out of power during outdoor activities. It is very suitable for exercise, travel, going out, business, sports, office, etc.Convenience and Handsfree Calling: The buttons on the wireless earphones allow you to skip/play/pause music tracks and all phones without having to get your phone. In addition, the neck type Bluetooth earphones will vibrate to remind you when there is an incoming call, so you won't miss any calls even in noisy environments or during exercise. Bluetooth headphones can connect two devices simultaneously.Portable and What You Will Get: Bluetooth earphones come with a portable case for easy carrying and storage.