A:We have enough stock to ship out within 48hours, lead time by express is 3-8 days, by EMS is 15-35 days. Normally we ship by Alibaba logistics, it’s expensive, but safe, reliable, efficient and fast, if you need to send by other express, please contact us. Q2:Can I OEM/ODM? A:OEM/ODM is welcome, we have R&D team ,UV printer /laser machine to meet you need. Q3 How to place an order ? A:“Start Order” “Choose the quantity, colors” “Filling your address"(remember to put your Phone Number & Post Code)” Or you could "Send inquiry" to us , we will fast reply within 2 hours of work time. Q4:How about the quality of your products? A:CE ROHS FCC MSDS approval, for more local certificates, please contact us for confirmation. Warnings: Not using headphones or charging them for a long time may cause the battery power of the headphones to run out and fail to turn on normally, which will lead to serious battery damage. It is necessary to put the headphones into the charging box and connect the charging box to the USB cable for charging. The headphones need to be charged for about an hour before the headphones can enter the normal charging state.