Gadget and voice control: Lets surgeons to annotate over the fly with the 1688 camera head, wi-fi headset or wireless remote control. My mom has an old, quartz clock which is not Functioning. New battery and clean up contacts did not assist. It just sits there. There are unique versions https://1688hd31975.blogdanica.com/33836088/5-essential-elements-for-1688hd