Product Description:1. Super Clear Calls: Packed with 4 beamforming mics, these bluetooth headphones can effectively reduce the background noise during calls. The sound here is satisfying because its not muffled and hissing2. Excellent Sound Quality: Adopt a dual dynamic-armature driver, the bluetooth earbuds can deliver powerful bass, clear vocals, and crisp treble. You can enjoy various styles of music with a better sound stage.3. Ergonomic Design: With the ergonomic surface design and 3.7g lightweight, this bluetooth wireless earbuds not only create a secure fit even during sports but make the earbuds comfortable to wear over long periods.4. Personalize Your Earbuds: Maximize your earbuds with QCY APP. Reset the control function of the touch buttons, customize the EQ, find headphones, upgrade the firmware, restore the factory and many other functions.5. Listen All Day, Charge In Minutes: Equipped with a built-in 600mAh battery, you can enjoy a full working day of charge. 3.5hr per single charge and 21hr with charging case. Plus, 10 minutes of fast-charging breathe 60 minutes of life into these buds.Parameters:Pairing name: QCY-T11Bluetooth version: V5.0Available system: ios / AndroidOperation range: 10mBluetooth profiles: HFP / HSP / A2DP / AVRCPBattery life: 3hr of calling; 3.5hr of playbackBattery capacity (case): 600mahTop-ups provided by charging case: 5 ( for both earbuds )Charging port: Type-C