High-quality speakers with 8mm Dynamic Driver; Lightweight 4gm each bud; 3 Hrs Talk-time; 4 Hrs Playback Time (Earbuds) & Extended Playtime up to 12Hrs using Charging Case. Snug-fit Earbuds; Multi-function key allow calls & music control for a hands-free experience. In-ear True Wireless Stereo earbuds featuring advanced Bluetooth v5.1, flat smart touch control surface, deep bass, low latency streaming & built-in ceramic mic in each earbud for stereo phone calls.