RIVERSONG EARBUDS

Bluetooth version: V5.0
Bluetooth solution: HFP, HSP, A2DP, AVRCP
Frequency range: 20Hz-20KHz
Connection distance: 10m
Speaker size: Φ8mm
Impedance range: 32 Ω±5％
Earbud  battery capacity: 50mAh
Charging case battery capacity: 500mAh
Input: 5V 0.5A
Charging time: ~1.5h
Playback time: ~4.5h (volume at 70%)
Charging interface: Type-C USB