The Hoco ESD15 are wireless Bluetooth headphones designed for comfort, convenience, and extended listening. 

Features:

• Bluetooth Connectivity: Utilizes Bluetooth Version 5.3 with JL AC6925F chipset for stable and reliable connection to your devices.
• Audio Quality: Equipped with 40mm drivers that deliver clear and powerful audio, providing an immersive listening experience.
• Long Battery Life: Packs a 400mAh battery offering up to 12 hours of continuous music playback or talk time on a single charge.
• MicroSD Card Support: Supports microSD cards up to 32GB, allowing you to store music files directly on the headphones and enjoy them without needing a connected device.
• Multiple Playback Options: Offers Bluetooth, microSD card, and AUX cable connectivity for versatile usage.
• Quick Charging: Supports fast charging via USB Type-C, taking only 2 hours for a full charge.
• Comfortable Design: Lightweight and presumably comfortable design for extended wear.

Specifications:

• Bluetooth Version: 5.3
• Chipset: JL AC6925F
• Speaker Size: 40mm
• Battery Capacity: 400mAh
• Music/Talk Time: Up to 12 hours
• Standby Time: Up to 200 hours 
• Charging Time: Approximately 2 hours
• Charging Interface: USB Type-C
• MicroSD Card Support: Up to 32GB
• Frequency Range: 2.402-2.480 GHz 
• Operating Range: 10 meters (may vary depending on environment)
• Supported Protocols: A2DP, AVRCP, HSP, HFP 
• Color: Grey