The sds p3022 cameras capture video at 720 tvl resolution for clear vivid image quality in keeping with this high standard the dvr records at 960h high definition onto a 500 gb hard drive to capture all of your important video eventsr featuresr r 2 720 tvl high resolution night vision weather resistant camerasr 4 channel 960h dvr built in 500 gb hddr motion event tampering alerts with real time monitoring recordingr anytimeanywhere viewing with free ipolis appr r anytimeanywhere