VGA output function. It can freeze the images Both freeze device and handpiece are with quick-connector function It can be divided 1/4/9 images on the screen, and can be swithched very easily to each other between 1 image and 4 images and 9 images. With PC signal input jack, can use the same LED monitor with PC host. It also can be controlled by external foot pedal. Specification: Image sensor: 1/4" Sony CCD Image resolution: 0.68 mega pixels Lamp: 6 PCS white LED(5600K) Accumulation point: 5mm~50mm Photographing visual angle: 70 degree Signal output: Video/S-video Signal format: NTS/PAL(option) Images resolution: 640X480 pixels Cable length: 2M