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Guangzhou DSPPA Audio Co., Ltd. is a professional audio manufacturer since1988. With more than 30 years' history of designing and manufacturing audio products, DSPPA has enjoyed a high reputation in and out of China. Technology innovations, strict quality and environment control (ISO 9001&ISO14000) and market-oriented products have made DSPPA to be the leading brand in the field of public address system  and  conference  system. As  the  chief  editor  of  the Technical  Code  for  Public Address  System Engineering  of  China,  DSPPA  is  widely  recognized  as  the  largest  and  most  professional  audio equipment supplier in China.

Since the inception in California, USA in 1999, Cooltron has been dedicated to custom designs and manufacturing business of thermal management products - fans, blowers and heatsinks to serve world class customers for over 25 years.
With the industry-leading thermal management technologies and advanced manufacturing facilities, and taking customers' budget constraints into consideration at the beginning of the new project's engineering cycles, Cooltron is able to provide optimized custom thermal solutions for better thermal performance and much affordable budget that not only help customers resolve quite often seen overheating problems in today's more thermal management demanding than ever electronic products, but also help customers develop more niche market fit products.
Full Lines Thermal Products and Extensive Industrial Supply Products
Cooltron has been successfully supplying a great variety of application markets with over thousand models of fans, blowers, heatsinks, and accessories. Moreover, Cooltron is now developing more extensive products to Value-Added Assembly customers in the Health Care, Home Appliance, Automotive, Automation and other industrial application markets, like miniature Micro Motors and Speakers to integrate with auto-dispensing hygiene products, hand dryers, shower and bathroom water supply controls, vending machines, and home appliance products.
Proven Manufacturing Quality Controls & Safety Compliance
Cooltron factories in China and Taiwan are ISO certified and produced products are safety regulations compliant including UL, ETL, CUL, TUV, VDE, CSA, CCEE, SEMKO, FIMKO, NEMKO, DEMKO and EEC. Cooltron strictly enforces its quality controls over all products during all production phases before shipments, and closely work together with global customers for any defective returns correction to assure Cooltron's products quality and reliability. Years of manufacturing experience with world famous name brands and EMS/CM supply chain partners guarantee Cooltron products' quality and reliability.
Mission Statement
Cooltron greatly value its customers and their opinion input. As an industrial supply provider, Cooltron's mission is to satisfy all customers' demands in a professional manner and provide high quality products at a competitive price in a more competitive market than ever today.