【Product Features】: Body size: 42 x 55 x 11 (mm). Built-in 115mAh large-capacity battery, with a charging time of about 2 hours, talk time of about 10 hours, music playback time of 8 hours, and standby time of about 20 days. It can display the battery level on the iOS system, and the communication distance is about 10-15 meters (without obstacles). Voice control is possible, and you can enjoy high-quality sound. The charging problem is also thoroughly solved, allowing for reliable charging. 【Dual-Ear Compatible & Rotatable】: Comfortable fit: The earphone receiver can rotate 270°, so the microphone flip arm can rotate to fit both ears and can be adjusted to your preferred angle. The ear-hook style is designed with comfort in mind, providing a comfortable fit even for long periods. Furthermore, the ear hook with a fit structure that allows for stable wearing is made of smooth paint and skin-friendly silicone rubber material, allowing you to experience a soft fit. It can be used for driving, exercise, business, sports, commuting, school, etc. 【Compatible with Various Devices】: Powerful Bluetooth V4.1 technology can transmit strong audio and fast, stable signals within a range of 10-15 meters. It can also pair with two devices simultaneously and is compatible with most Bluetooth-enabled devices, including iPhone, Android, Samsung, Huawei, and PC. 【Bluetooth 4.1 & High-Quality Sound Headset】: Adopting Bluetooth standard ver4.1, this wireless headset achieves faster and more stable communication. Despite being a single-ear earphone, it supports A2DP, allowing you to enjoy music and one-seg audio output. Equipped with CSR chipset technology, you can enjoy higher-quality, distortion-free, clean sound.