Unit and voice control: Will allow surgeons to annotate to the fly through the 1688 camera head, wi-fi headset or wireless handheld remote control. My mother has an old, quartz clock that is not Functioning. New battery and clean up contacts did not assist. It just sits there. There are https://1688hd42985.widblog.com/88834365/5-essential-elements-for-1688hd