Brand: Baseus Model: A03 Frequency response range: 20Hz~20KHz Bluetooth version: V5.0 Battery capacity: 3.7V/60mAh Charging time: About 1.5 hours Talking time: Up to 6 hours Playing time: About 4 hours Operating distance: 10 meters Support agreement: HFP, HSP, A2DP, AVRCP, SPP, PBAP Siri function: Yes