If item doesn't turn on ,please suggest customer according to the user manual or you can transfer the customer to contact us anytime,our service team will directly contact customer within 12 hours Before start using the headset,customer have to use the USB charge cable to charge it first,if don't charge,the item won't turn on . Customer need to push calling button for 2-3 seconds to start device, then will find the red and blue light flash alternately,which means item has been turn on . If the someone can't hear the voice when talking on the phone ,customer just need to adjust the volume of headset ,not volume of cellphone . If the item doesn't hold charge ,customer just need to switch another usb charge cable or different USB adaper to charge ,if the led lights shows red lights which means the device is being charged .Or Amazon can transfer the customer to contact us ,our service team will contact the customer to provide them FREE usb charge cable or replace a new device directly . if the item doesn't work or defective ,Amazon needs to suggest customer contact us ,our service team will replace a new device for defective item or provide returns lable to refund to customer . ,if we received any negative feedback ,we have been in contact with customers and replace the new device for them or refund . we have arranged 3 QC inspectors who is specialized in supervising our operation to pre-test all the items before sentshipment to FBA, ensure all the items defective were found before shipment. we replied to the buyer emails in time,avoiding leaving the customers with bad impression like nobody is handling his case,which result in the submit of the complaints. we have been pretest every items before the shipping or before ship to FBA and ensure all the products is in a good condition,will not cause negative complaints. 1x Bluetooth headset 1x USB Charging Cable 1xUser Manual 6 x Ear Rubbers
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