Brand new, unopened. ● Model Number: QCY-T13 ● Communication Method: Bluetooth 5.1 ● Communication Distance: 10m ● Playback Frequency: 20Hz〜20KHz ● Supported Profiles: HFP/HSP/A2DP/AVRCP ● Continuous Playback: Approximately 8 hours ● Standby Time: Approximately 80 hours ● Battery Type: Li-ion ● Battery Capacity: 3.7V 50mAh (Earphones) / 3.7V 380mAh (Case) ● 7.2mm Driver, Hi-Fi High-Quality Sound ● Equipped with 4 Microphones, ENC Noise Reduction ● Low Latency Mode, Dual-Ear Rapid Charging