Details Designed to Calm Your World ANC Mode/Transparency Mode Advanced Certification TÜV Rheinland certificate ; FCC ; UKCA ; ROHS ; CE Intelligent Noise Cancellation 3 different noise cancellation modes to choose in the app. 10 adjustable settings for everynoisy situation. Indoor ModeCommute ModeOutdoor Mode Bluetooth 5.2 This Time; Loud and Clear 4-MIC ENC technology uses an Al neural network algorithm to separate the ambient noisefrom human sounds. Even in a noisy back -ground ; you can still enjoy a high-qualityhone call. Superb Connectivity with Low Latency 0.038 seconds surprisingly low latency; perfect for videos and games 10 Minutes Charging 2 Hours Enjoying About 30 hours Use with the charging case Simultaneous Connection for 2 Devices You can connect the earphones to 2 different devices at the same time and seamlessly switch audios between the devices so that you wont miss any important calls *OTA Upgrade Download the baseus app; bind the M2 headset; enter the settings; upgr