Awei A997bl on-Ear Wireless Bluetooth 5.1/5.3 Headphones-Black.

Bluetooth Version: V5.1 or V5.3 (depending on model batch) Driver Size: 40mm Battery Capacity: 300mAh Playtime: ~15 hours Charging Time: ~2 hours Frequency Range: 20 Hz – 20 kHz Sensitivity: 110dB±3dB Impedance: Connectivity: Bluetooth, 3.5mm Aux Features: Foldable design, built-in microphone, volume/track controls