LawMate Camera Finder WCH-300X Camera Finder/DVR Finder locates multiple wireless cameras, lets you see what they see, AND has an external camera input connection to act as a portable DVR. Instant recording and playback buttons make this extra easy to use! Records onto a micro SD card, 32 gb maximum capacity for considerable record time. You have the option of buzzer or vibration alert depending on the situation. Allows for adjustable frequency bands up to 16-band. Plus, it also operates as a wireless receiver to allow up to 2800 mhz frequency band. For long-term storage of data, a USB connection allows you to easily transfer evidence to your computer.