•   Bluetooth Earphone Wireless Earbud Running Single Headset For iOS Android
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• Specifications:
• Bluetooth wireless version: V5.0
• Working distance: 10-15meters
• Response frequency: 20Hz-20k Hz
• Frequency: 2.4GH-2.48GHZ
• Sensitivity: 96db+2db(-2db)
• Support File format:  A2DP AVRCP HSP HFP
• Weight: about 13g
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• Features:
• Multi-device connection: connect two electronic devices at the same time
• Voice Reminder: Report current status of the bluetooth headset in real time
• Single bluetooth can use left ear or right ear by rotating the button easily