Bluetooth version : Bluetooth V5.0 Playback time : about 6 hours Earbuds + 18 hours Charging case Input : DC 5V 60mA (Earbuds) Frequency response : 20Hz-20KHz Sensitivity : 95 dB Bluetooth protocol : A2DP,AVRCP,HFP,HSP Effective distance : 10m DC 5V 400mA (Charging case) Audio decoding : S B C aptX