Hi byunjaeil,

Sorry about this issue.

This item SKU 3809703 you ordered is Authentic DualShock 4 Wireless Game Controller for PS4 precision control / new ways to play / USB rechargeable as we stated on our webpage.

As I checked your video,this device works well at first,but stop working after few minutes,but I just saw you tested only one of them.Does the problem is constantly?

If both of them does not works well,you can return them back for exchange.
We will improve the quality control process.

Most of the items sold on FastTech.com are covered by FastTech Standard Return Policy, i.e. replacement can be requested within 6 months from date of shipment and refund within 45 days from date of delivery. This item is covered by the said warranty. For more details, please visit this page: http://www.fasttech.com/pages/standard-return-policy. In this case, the details are as below:
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“Damage on Arrival (DOA)

FastTech guarantees safe delivery of your orders. We exchange all damaged items. FastTech covers all return shipping charges.

Contact us for a RMA, within 5 days of delivery, and ship products back via the least expensive method.”

Policy link: http://www.fasttech.com/pages/standard-return-policy
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We can ship replacement when the item is returned back and shipping reimburse will be issued when we receive your shipping receipt or package photo for stamp shipped items.

Can you kindly check with your local post office for the least expensive shipping cost to return the defective item back to Hong Kong? We will reimburse the postage fully in this case.
Please kindly quote us the shipping fee of registered/unregistered international postal letter mail if possible. International parcel or express service is the last to be considered considering their high expense.

Please kindly confirm so we can proceed accordingly.

Thank you for your understanding.

구굴번역으로 대충 이해가 가는데 꼼꼼하게 확인해보고 싶습니다.