High-quality wireless earphones with up to 50 hours of playback. - Model Name: Capsule3 Pro - Bluetooth Version: V5.3 - Frequency Response Range: 20Hz-40kHz - Maximum Communication Distance: 10m - Playback Time: Approximately 8 hours - Playback Time with Charging Case: Approximately 50 hours - Battery Capacity (Earphones): 35mAh - Battery Capacity (Charging Case): 500mAh Thank you for viewing. I rarely used these, and the actual usage time is only 2 hours.