Features: Driver unit:40mm diameter Support Bluetooth 4.1 version downwards Compatible with 4.1 version Scope of work:10 meters USB charging cable: AC input 110-240V DC input 5V Talk time: 6hours Standby time: up to 15 hours Operating frequency: 2.4GHz-2.4835GHz The output frequency:cla2 Noise reduction technology: DPS digital signal proceor Support A2DP function AVRCP remote control capabilities Supports automatic switchover to incoming call function With the end number redial function Large and small volume adjustment Forward backward selections feature pause function Specification: USB charge: DC 5V IN FM Frequncy: 87.5-108MHz Bluetooth frequency: 2.401-2.480GHz Bluetooth distance: 10 meters Frequency:50HZ-20KHz Output power:35mW SNR:88DB Charging time: 2hours Package includes: 1 X Bluetooth Headphone 1 X USB Cable About shippingShipping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days ar buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for remote areas,it may take a little longer). Special Announcement:Please fill in the correct and detailed consignee, address and phone number in the order. For fast and correct delivery.If you do not receive order within 30 working days,please feel free to contact Customer Service before leaving Negative and Neutral Feedback, we will do our best to help you resolve the problem.TaxNo, you will only pay what is quoted as total cost at checkout, no more. You are not expected to pay any additional duties ores. If you are asked by Customs or our logistic partner to pay duties, please contact our Customer Service .Your 100% satisfaction is very ant to usIf the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.