Hello!

Can anybody advise me some variants for power supply

Like this one:
http://ohmps.com/product/5/

 

Please clarify exactly what you mean by "variants for power supply".

For example:
1. there are variants of size
2. there are variants of voltage
3. there are variants of current
4. there are variants of color
5. there are variants of weight
6. there are variants of readout
7. there are variants of number of knobs