Shenzhen Three Plus One Technology Co.,Ltd is a high-tech enterprise which focuses on R&D, production, sales in rechargeable batteries field. After several years of rapid development, the company now has Xinlipu Electronic Technology (Shenzhen) subsidiary, Haoxun Electronic Science and Technology (Dongguan) subsidiary, and also has several well-known brands, like Koloco, seven.D.S, EPUIRIE and EWAX.As a professional manufacturer of smart battery case, wireless charger, power bank, phone case, Bluetooth earphone and other mobile accessories. All the products are popular in both overseas and domestic market. Many products have passed CE,ROHS,FCC and UL approval. We have a mature production line and Experienced R&D and ID design team, welcome OEM/ODM orders.Three plus one technology co.,ltd to "To sow before you reap, win-win with customers" as the business philosophy, with strong technical strength, we will provide customers with unrivalled quality unbeatable price and valuable services. We are pleased to establish long-term business relationship with clients from all over the world.