SHENZHEN LITU DIGITAL CO., LTD We specialised in USB flash drives for more than 10 years. We are professional manufacturer and exporter , concered with the design , development and production of the usb flash drives. We have over 2000pcs different styles of usbs , with different materials.// We manufacture the usb chips by ourselves , the quality we can 100% controlling of the quality.//We have over 1000 customers all over the world . Most of them customized their own logo on the usb , for their company publicity and advertising . If they need to preload their product catalogue and don’t want them to be deleted , we can use our technology software to write protect routine on the usb , so their catalogue or files won’t be deleted and the usb can be used normally.