This model has double the resolution & frame rate of most lighter DVR cameras on the market. It can record 4 hours of VGA video (640 x 480) with audio at 30 fps onto it's 4GB of internal memory. Easy to use "one touch record" button lets you discretely record any evidence instantly. Video resolution: 640 x 480 VGA Frame Rate: 30 fps Voice recording: Yes Internal Memory: 4GB Date & time stamp Recording mode :continuous recording until memory is full or manually off Adaptor type: USB (Universal Serial Bus) adaptor charging cable Battery type: Lithium-ion Record time: 4 hours Battery use time: about 3h Colour video with voice lets you clearly see who’s there & hear what they say Connects to PC via USB (Universal Serial Bus) Weight: 20g 1 Year guarantee This lighter DVR Camera is deal for both covert surveillance or for interview recording & is small enough to conceal almost anywhere.