Bluetooth V5.2 Earphone Hanging Ear Running Listening Song Waterproof Wireless Mini HIFI Stereo With Mic Noise reduction Earbuds Product Parameters Product name:M-F8 Bluetooth version:V5.2 Distance: 10 meters Talk time: about 6 hours Listening time: about 6 hours Headphone battery: 75MAH Wireless frequency: 2.4GHZ Supported protocols: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Transmission distance: 10 meters Charging voltage/current: 5V/1A Charging time: about 1 hour Standby time: 120 hours Product battery type:High energy button battery Speaker impedance: 8MM 32&; Microphone sensitivity: -42Db Working temperature: -10-50 OPP bag weight: 17.4G Headphone weight: 6G texture of material:ABS + silicone Charging interface:Micro USB Accessories: with charging cable X1, manual X1, earphone X1, ear cap OPP bag X1 long-lasting business lifeHD calling Shocking sound ffect I 5.2 Bluetooth chip I Compact and portable BASS heavy bass, intelligent voice call voice reduction technology Greatly optimized the clarity of the sound.