High-Resolution Wireless Bluetooth Earphones, ATH-CKR75BT GM (Silver) - Brand: audio-technica - Model Name: ATH-CKR75BT GM - Connectivity: Bluetooth - Features: High-Resolution Audio Playback ■ Size: H32 x W11 x D26mm ■ Weight: 17.8g ■ Communication System: Bluetooth standard Ver. 4.1 compliant ■ Maximum Communication Distance: Within 10m in a clear line of sight ■ Power Supply: DC3.7V Lithium Polymer Battery (built-in) ■ Charging Time: Approximately 3 hours ■ Continuous Communication (during music playback): Up to approximately 7 hours (varies depending on usage conditions) ■ Continuous Standby: Up to approximately 200 hours (varies depending on usage conditions) Thank you for viewing. Management Number 13-75