Wireless binaural stereo headphones, Left and right earphone can work at the same time. 4.13mm dynamic unit, half-in-ear headphones. Low power consumption, long battery life.Bluetooth protocol:A2DP 1.3; Hands-Free Profile (HFP)1.6 ; AVRCP. Effective frequency bandwidth:20 Hz 20,000 Hz. Charging port :Type C USB. Theoretical call time:about 2.5 hours. Not including in retail package. The item "Huawei FreeBuds 2 Earphone Bluetooth Wireless Mic charging headset Stereo" is in sale since Wednesday, April 10, 2019. This item is in the category "Cell Phones & Accessories\Cell Phone Accessories\Headsets". The seller is "wmall2016" and is located in fuzhou. This item can be shipped worldwide.