• Comfortable wearing: Not in the ear, open design, truly painless + air conduction, non-sensory wearing
• Perfect for sports: Great for running and other sports, stable ear-hanging design, won't fall off during sports
• Good sound quality: Metal moving coil diaphragm, shocking bass, bring excellent music experience
• Long battery life: The earphones provide 6-7 hours of music time per session
• Touch control: Intelligent touch adjustment, you can switch music, answer/hang up calls easily

Specifications:

• Model: BL139
• Bluetooth-compatible chip: JL6973
• Bluetooth-compatible version: 5.3
• Audio agreement: HFP, HSP, A2DP, AVRCP, SPP, PBAP, TWS+
• Bluetooth-compatible distance: 10M
• Earphone music time: 6-7 hours
• Standby time: 20 hours
• Charging port: TYPE-C
• Charging box charging time: 2 hours
• Earphone battery capacity: 3.7V/40mAh
• Charging box capacity: 3.7V/300mAh
• Speaker size: 13mm