The CM70-C is comfortable and lightweight to carry. With earbuds of varying sizes, it is very flexible and adapts to any ear. The headset is made from an advanced shape memory alloy and supports various Bluetooth profiles as well as Huawei HiPair. You can easily transport the CM70, operate it effortlessly, and conveniently pair it with your computer, phone, tablet, or other Bluetooth devices. It features a built-in hall magnetic sensor that can detect whether the headphones are in use or not. This intuitive control function puts the headphones into sleep mode as soon as both sides are connected, and music playback automatically resumes after disconnection. The Huawei FreeLace Buds come with a USB Type-C port, allowing for quick charging and Bluetooth pairing of the gadget. With just 5 minutes of charging time, up to 4 hours of audio playback can be achieved. A full single charge can provide up to 18 hours of continuous playback. In standby mode, the Huawei FreeLace can be used for up to 12 days. The Huawei wireless headphones can also be charged via a smartphone with a reverse charge function. The earbuds are also IP55 certified, providing comprehensive protection against water and sweat.