Headphone specifications:

• Speaker Size : 40mm
• Frequency Responce : 20HZ -20KHZ
• Max. Input Power : 20MW
• Built-In Aux Input : 3.5mm Stereo Jack
• Impedance : 32ohm
• Sensitivity : 96 + - 3 DB

Bluetooth V5.0 :

• Wireless Distance up to 10 meters
• Support A2DP , AVRCP ,HSP ,and HFP
• Battery level indicator on smartphone

Build-in rechargeable battery :

• 200Mah lithium battery
• Continuous music playback : up to 8 hours operation
• Continuous talk time : up to 8 hours operation
• Standby time : up to 15 days
• Charging time : 2 hours