Noise Filter,

noise suppressor,

level converter

Ground loop isolation
Signal noise elimination
Cylindrical metal case with
heat-shrink tube
20AMPS
Input:30W

And We have many other types, pls check our website, www.skyinternational.com.cn 

Here display some,

NF-40WB

AD-115

NF-116

If you are interested in our goods, pls feel free to contact us, thanks!