Bluetooth Built-in mic Carrying case charger Easy pairing Completely wire free SPECIFICATIONS: Bluetooth version: V5.0 Frequency response: 20-20KHz Distance: 33f Driver unit: 10mm © 2022 MiGear International Group LLC. All rights reserved Earphone battery capacity: 40mAh Working time: Earphone: 1-1.5 hrs / Case: 3 times Charging case battery capacity: 250mAh Charging time: Earphone: 40 min- 1.1 hrs Case: 1-2 hrs The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by MiGear International Group LLC is under license. Other trademarks and trade names are those of their respective owners.