HD Pen Hidden Camera with Built in DVR. The HD hidden pen camera has a crystal clear 1080P (1920×1080) video resolution at 30fps and stores the footage on a 32GB memory card. The battery will record for 2.5 hours on a single charge. The HD resolution ensures that your videos are smooth and clear even when there is a lot of movement. Its super easy to operate just one button operation. Turn the pen on, click the button once to start recording and click it again to stop. When you are ready to watch your videos just plug the pen directly into the computer using the USB cable.