Earphone parameters:

Bluetooth profiles：HSP, HFP, A2DP and AVRCP
Effective distance：10 meters (equal to 33 feet)
Frequency range：2.4-2.48GHz
Frequency response：100Hz-20kHz
Distortion≤1%
Microphone sensitivity：-40db
Playback time：Music time: 4-6hours
  Standby time：125 hours
Built-in lithium battery：65mAh
Charging port：Micro USB
Charging time：Approx 1-2 hours
Unit weight：Approx. 16g

Troubleshooting:

1.Hands-free call is only available at BT connected status.
Still the phone call could be interfered with high frequency electromagnetism.
People should try not to use this product under high frequency environment.

2.Bluetooth is a bidirectional transmiting protocol;transmiting distance is highly related to audio player.
Compatible BT players are recommended.

3.When BT transmitting devices cannot be connected,please delete the rest BT receiving devices name on the list.
Re-activate" JL BT",re-searching and re-paring.

4.The sound performance could also be affected when BT transmitting devices is under poor signal environment,or under low battery capacity.

Packaging:

1*headphones
1*USB Cable
1*User Manual

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• This bluetooth in-ear headphones offers incredible crystal clear sound no matter your taste in music or answering a phone call; and you will never miss an in coming call phone with its voice prompt function.
• This wireless bluetooth headphones can intelligently filter ambient noise and reduce background noise, offers incredible sound quality, you can focus on your favorite music and enjoy yourself when you are at home, in the office, in the workout places etc.
• It is great for gym, jogging, running, cycling, biking, hiking, full body workout, exercise, training etc.
• This wireless headset use advanced bluetooth version 4.1, easy to pair with iPhone, iPad, Samsung, Sony, HTC, Android cell phones, Windows phones, and most bluetooth enable devices.Ergonomically design.
• This wireless headset, Made by TechCode with best quality.

This bluetooth in-ear headphones offers incredible crystal clear sound no matter your taste in music or answering a phone call; and you will never miss an in coming call phone with its voice prompt function.TechCode