In 2011 established own brand “doocoo”, spread widely in few years. Especially, main product is power bank, we applied in Japanese or Korean of Samsung Li-ion cell. Our power bank had approved the 25 item of the strictly inspection before ship out. And afford 1 year after marketing maintance. Satisfy the trust and insist quality by consumer. Additionally, our firm had insured about NTD:20,000,000 for the charge battery. It makes the user feel more confident.