Name: In-Ear Bluetooth Headset Bluetooth version: v5.1 Bluetooth distance: less than 12 metres Headset charging time 1.5 hours Song playback time 5-7 hours*3 Transmission distance greater than 10m Charging port: type-c Headphone battery capacity: 3.7v/40 mAh Charging compartment voltage battery/capacity 3.7v/400 mAh DESCRIPTION LONG LIFE & FAST CHARGING: These in-ear bluetooth headphones not only provide up to 21 hours of combined playback time (5-7 hours of continuous playback per full charge, with the charging compartment you can recharge an additional 3 times), but they also fully recharge in just 1.5 hours, ensuring you enjoy an uninterrupted music experience anytime, anywhere. Smart Touch and ANC Active Noise Cancellation: Built-in advanced smart touch control function, you can easily control the music playback, answer phone calls or activate the voice assistant by simple touch operation. At the same time, ANC active noise cancellation technology effectively isolates external noise, allowing you to immerse yourself in a world of pure high sound quality. High-quality wireless listening experience: adopting the latest Bluetooth 5.1 version ensures stable connection and low-latency transmission, with a transmission distance of up to 10 metres or more, providing you with a clear and smooth audio experience, whether you're enjoying music or watching a video, you can enjoy a detailed and realistic sound effect. CONVENIENT TYPE-C CHARGING PORT: Equipped with modern Type-C charging port, compatible with most of the fast-charging devices on the market, the forward and reverse plug-and-play design makes the charging more convenient and quicker, and reduces the hassle in daily use. PORTABLE CHARGING COMPARTMENT DESIGN: The included charging compartment not only provides additional power supplement for the headphones, but its delicate and compact design is also easy to carry, charging your headphones at any time and keeping them fully charged. The charging compartment has a 3.7V/400mAh high-capacity battery, which is enough to charge the headphones for many times, making it an ideal companion when you are travelling and on the go. Product List In-Ear Bluetooth Headset*1