No, the MatriX does not need an SD card in order to use or watch live feed. However, if you need to record and save the videos you will need to purchase one. SD Cards are available at All Trends USA.
Last night, we saw on the camera the 3 guys broke into our store. We recorded everything that happened that night. Luckily, this camera has a night vision feature and it can record even the audio. We reported to the police station and they recognized those people. They even appreciate how clear the recorded video is. I hope they will catch those people. Thank you Matrix.