All of our products will be aged for 2 hours and tested three times before packing. Our QC team test each product based on international testing method . During production process , our engineers go to check each production line to ensure each process in good situation. When we are packing the goods, we will check all spare parts included in the gift box by scale one by one. After packing, our QC team will make random inspection agian to ensure the goods in good quality.