Bluetooth version: bluetooth 4.1
Bluetooth distance: no obstructions 10 meters
Resistance: 32 ohms + -15%
Sensitivity: 103 + 3db
Frequency response range: 50-10khz
Microphone sensitivity: -42 + -3db
Microphone resistance: 2.2k ohms
Standby time: about 120 hours
Talk time: about 5-6 hours
Music time: about 4 hours
Charging time:about 1.5 hours

Packing List:
1* Ear-hook Wireless Headphones(Single-sided For Left Or Right Ear)
1* Usb Cable
1* Chinese/English Instructions

Dear buyer friends:

. Please Check out your address carefully when processing order.

. We will only send to the address you write.

. Russian friends need to write your full name,or will can't receive the parcel.

. We offer 7-24 hours online service.

. Your inquiry will be reply within 6 hours

. We will check the goods carefully before shipping.

. Our working time. monday to Saturday.

. If anything we can help you.pls contact us.

. If you are not Satisfied with product.pls not open a dispute.pls contact us.we will give you a Solution asap.

. Dispute is not the only way to slove the problem.it's better happy to slove it.thank you.

. If our responsibility.we accept return the goods or refund.

. If confirm missing.we will check it and resend.

. If you not receive your items.pls contact us.

. Mostly,the parcel will arrive on time.but may be sometimes will delay.pls be patient and waitting.thank you for your understand.

. The payment is only for the order.different country different tax policy.may be you will charge tax fee.pls consulting the staff of local customs before purchase.

. If you are satisfied with the items.We will appreciated to you.if you give us 5 shining star and share your good feeling or share the beautiful real photos.

. Your positive feedback will be very helpful to us and the new buyer.

. If you are not Satisfied with product.pls not open a dispute or leave a negative feedbkack.pls contact us.we will give you a Satisfied Solution asap. thank you