Upgraded Dynamic speakerAdopting BT 5.2 and upgraded Dynamic Speaker, MIFO S wireless earbuds with microphone offer fast paring and a stable wireless connection with sound quality. Active Noise Canceling and Transparency mode6Mic ANC+ENC noise reduction for calls, clear voices can be heard and transmitted during calls. Transparent settings allow you to communicate face-to-face with people even while enjoying music. Product Model: mifo S Color: Stary Black/Black with Letter/Classic White BT version: 5.2 Bluetooth protocol (version): HFP 1.7HSP 1.2A2DP 1.3AVRCP 1.6 Earbuds play time: Slight noise canceling mode-6 hours; Transparency mode-5 hours ; Strong noise canceling mode-4 hours Talk time: About 5H Earbuds total playtime: 40H Charging time: about 2H Battery capacity: 40mAh(Earbuds); 600mAh(Charging case) 3.7V BT supports decoding formats: SBC/AAC Charging Case: Type-C port USB Earbuds charging port: POGO PIN USB Speaker driver: Dynamic Earbuds sensitivity: 103db3db@1KHZ Speaker driver frequency range: 20-20KHZ Microphone: WMM7018ABSNA0;WMM7027DBHN0 Microphone frequency range: 100-10K Hz Working temperature range: -10 - +55 storage temperature range: -20 - +60 Charging Box provide charging times: 6 times Charging Box charging time: about 1.5H Waterproof: IPX7 rated Product size: 24*14.5*20.5mm(Earbuds); 58.4*29.6mm(Charging case) Product Weight: 84.6g (Earbuds with case) Package size: 107x105x53mm Package weight: 210g