? Guangzhou Rontto Trading Co., Ltd. Specializes in production and sales: Nickel-cadmium rechargeable battery, nickel-metal hydride rechargeable battery, disposable dry battery, power bank, lithium ion battery, lithium polymer battery, notebook battery, battery charger, injection molding wire and other products, in strict accordance with the ISO9001: 2015 quality management system certification standard organization production and quality control, the company's products are widely used in: Wireless telephone, intercom, power tools, electric toys, emergency lights, flashlights, lawn lights, medical equipment, instruments and meters, resource exploration, household appliances, high-power lighting, outdoor mobile power supply and other fields.

Beijing W&F Technology Co., Ltd. is registered in Beijing, the capital of China, was established in 2006 and has been in continuous operation for 17 years.

Shanghai Govo Telecom Co., Ltd has been dedicated to manufacturing, selling products services for fiber optic communication for many years.

Green Optoelectronics Communication Co., Ltd. is one of the most professional companies specializing in the field of communication instruments and electrical appliances in China, we are offering state-of-the-art & cost effective products and solutions to the global customers in more than 40 countries.

Qingdao Sunet Technologies Co., Ltd (SUNET), estalished in 2006 Year(which located in beatiful city QINGDAO, Shandong Province), is a high-tech enterprise and a leading worldwide provider for Fiber Optic Components.

We, Techwin (China) Industry Co., Ltd was established in 1998, focusing on Cable and Antenna Analyzer, Vector Signal Generator, Synthesized Signal Generators, Vector Network Analyzer, Spectrum Analyzer, Fusion Splicer, OTDR, Optical Fiber Cable, PLC Splitter, Fiber Coupler, Fiber Cable Identifier, Optical Fiber Power Meter, Fiber Light Source, Optical Fiber Ranger, Optical Fiber Identifier, Visual Fault Locator, Optical Fiber Talk Set, PON Power Meter, Optical Variable Attenuator, Optical Tool Kit etc. Our products and Service are exported to worldwide(More than 60 Countries and Regions) and we create USD10, 000, 000 for our annual sales.