Panasonic Digital Camcorder Panasonic Digital Camcorder Sdr-s7?

Panasonic digital camcorder sdr-s7? - panasonic digital camcorder

Hello

I brought a Panasonic SDR-S7 camcorder and have to buy another memory card. in the store who sold me Lexar SDHC, class 4 4 GB.

I have a card, much like amazon card SDHC Class 4, 8 GB, but the Lexar brand, it is not?

I do not know if there other requirements? or as long as a class 4 SDHC card in my camera to apply?

Thanks