Experience advanced sound technology with the Wiwu AirBuds Pro 2F. This ultra-light in-ear earphone features active noise cancellation, pop-up window, tap function, and main-secondary switching, to ensure superior audio quality. With HIFI clear voice, it allows you to enjoy music and conversations up to 10m away with a wireless transmission distance of 2.4GHz-2.48GHz. The earphone has a standby time of 180 hours and a charging case battery capacity of 250mAh, giving you up to 6 hours of music time on a single charge. About this item 1 year warranty. Main-secondary switching. Pop-up window. Tap function. Intelligent Induction. Active noise cancellation. HIFI clear voice. Silicon case and lanyard. Standard: GB/T14471-2013 Earphone: Fit in ear Specification: Lightning Wireless connection version: 5.2 Wireless transmission Distance:≥10 m Transmission frequency: 2.4GHz-2.48GHz Battery capacity: 33mAh Standby time: 180hrs Charging case battery capacity: 250mAh Music time: About 6hrs Talking time: About 5hrs USB charging: About 2hrs