holdpeak.com,outdoor air quality testing equipment,The strong customer base of HoldPeak is earned by connecting to customers to better understand needs. It is earned by constantly challenging ourselves to push the boundaries of performance. It is earned by inspiring confidence through invaluable technical advice on products and processes. It is earned by unremitting efforts to bring this brand to the world. HoldPeak provides outdoor air quality testing equipment products that are selling well in United States, Arabic,Turkey,Japan,German,Portuguese,polish,Korean,Spanish,India,French,Italian,Russian,etc. HoldPeak,Our company main produces 12v dc power supply unit,ac adapter 2a,power plug transformer.