Toshiba's 3.5-inch S300 SURVEILLANCE Hard Drive has been designed and tested for reliable 24/7 monitoring designed for speed, capacity and extended content storage. Capture and analyze any image from up to 64 high-resolution video cameras with the S300. Memory is important to continuously capture a series of video evidence over a period of time. SURVEILLANCE gives you the ability to record and play back events in real time in high resolution with object recognition and face recognition. Supports up to 64 high-resolution cameras. Compatible with DVR, NVR, video servers and video management systems. 256 MB buffer. Integrated rotational vibration sensors.