These wireless earbuds are designed to provide a seamless audio experience with their advanced Bluetooth 5.1 connectivity and a transmission range of up to 10 metres. Conforming to the GB/T14471-2013 standard, they offer a comfortable half-in-ear fit and deliver exceptional sound quality with a frequency response ranging from 20Hz to 20KHz. Boasting a compact and lightweight design, these earbuds are equipped with a 28mAh battery that provides up to 4 hours of music playback or 3.5 hours of talk time. The included charging case, with its 250mAh battery capacity, allows for convenient wireless charging in just 2 hours or USB charging in 1.5 hours. When not in use, these earbuds can remain on standby for an impressive 100 hours, ensuring you're always ready for your next audio adventure. With their sleek and modern aesthetic, these earbuds are the perfect blend of style and functionality, making them an ideal choice for music enthusiasts and professionals alike.