Question

Hi, I want to buy a convertor for our laptop to be able to charged, which is a macbook air, and the tv or a hairdryer, which one do I need please?

Answer

I presume you are referring to an inverter. A 150w will be fine to charge the Ipad but if you want to run a TV or a hair dryer you would need to check the wattage of each appliance Here is a link to the inverters Inverter Link