MS-B2 OEM Wireless Headset Built-in Mic 40H playtime Headphones for PC Computer Smartphone Foldable Microphone Handfree Headset

Bluetooth version: Bluetooth 5.4
Audio decoding: AAC, SBC
Communication distance: ≥ 10m
Compatible systems: IOS/Android/Windows
Speaker unit: Φ 40mm 32 Ω
Frequency response: 20-20kHz
Supporting protocols: MP2 MP3、WMA、APE、FLAC、AAC、MP4、M4A、WAV、AIF、AIFC
Charging voltage: 5V/1A
Battery: 400mAh
Music duration: approximately 14 hours
Standby time: 200 days
Charging time: about 2 hours