About Us —— Hongkong Preface CO., LTD is located in Hongkong and office in Shenzhen.a world famous city for its small commodity trade and vibrant markets. Preface is specialized in Electronics and Components, such as IC chips, Diodes, Mosfet, Transistors, Resistors, Capacitors, Crystals, Inductors, Modules, Connectors, etc. With 6+ years BOM rich supply experience, professional selling team and scientific quality management, Preface is becoming an expert in BOM and Components supply. We strive to be the BEST of your retailing and wholesaling business partner. We are not just providing you Electronics and Components, but perfect user experience and service.
Product display —— Specializing in the development, production, sales, maintenance and service of electronic and electrical products, computer network engineering and maintenance, low-voltage electrical product agency, electrical equipment complete sets, construction and management
Semiconductor Semiconductor refers to a material whose conductivity is between that of a conductor and an insulator at room temperature. Semiconductors are widely used in consumer electronics, communication systems, medical equipment and other fields.
Single chip Microcomputer A single-chip microcontroller is not a chip that completes a certain logic function, but integrates a computer system on a chip.
Power converter Also known as AC converter, it is a kind of transformer. Due to the different power environments in countries and regions around the world, there are also differences in civil voltages, and the voltage application ranges of electrical appliances in different countries are also different.
Digital-to-analog converter Referred to as DAC, it is a device that converts digital quantities into analog. The D/A converter is basically composed of 4 parts, namely the weight resistor network, operational amplifier, reference power supply and analog switch. .
Project case —— Provide technical hardware support for top 500 high-quality enterprises and municipal facilities, which have been well received
Crane electrical control equipment
Semiconductor Automation Service

Complete design and manufacturing of low-voltage electrical equipment
起重机电气控制设备设计成套及维护
智能工程设计、施工与运维
半导体四号连铸
About Us ——
Hongkong Preface CO., LTD is located in Yiwu, a world famous city for its small commodity trade and vibrant markets. Preface is specialized in Electronics and Components, such as IC chips, Diodes, Mosfet, Transistors, Resistors, Capacitors, Crystals, Inductors, Modules, Connectors, etc. With 8+ years BOM rich supply experience, professional selling team and scientific quality management, Preface is becoming an expert in BOM and Components supply. We strive to be the BEST of your retailing and wholesaling business partner. We are not just providing you Electronics and Components, but perfect user experience and service.

Partner ——