I need to review and promote a particular electronic item on my blog and i will also need to talk about the specification and the design as well which the manufacturer sure has on their own site. SO how do I achieve this review and avoid plagiarism as well?
Just create a review and write it yourself word for word so no copying takes place. Otherwise you could pay someone to do it for you. Also in terms of a review, if I'am reviewing an iPad and list the specifications such as Operating System - iOS, Music Store - iTunes etc. that isn't really plagiarism and if anything I think that the manufacturer would be happy, as it's free promotion for them.
To avoid plagiarism, you have to consider taking a note of each data that you have gathered from the sources that you got the information. Give incites of the product and the overall performance. If you have tried the product or have someone tried it write it down. If you have facts about the manufacturer include it so that the viewer will know the details. It's like experimenting, you have to know everything about the product, creating enough test in order to create a solid conclusion. Determining the weakness and strength of the product enables you to have have knowledge to defend the data that you provided.