well, first of all the two types of suunto computers we're talking about have different pin arrangements which generally requires a person to purchase two separate interfaces if they happen to have say a cobra and a stinger since these two have different pin arrangements. If you had a cobra and a mosquito, vyper,vytec, or D3, then you would only need one interface as all of these have the same pin arrangement. To answer your question, the interface allows the user to download dive info from their dive computer to their PC and adjust dive computer settings with the PC. This interface would serve to save money over having to buy two separate interfaces. Given the cost of some interfaces, this could be a substantial savings. I am told, due to the policies of this board, I can no longer provide pricing information publically for the interfaces I build. If you or anyone is interested, please visit my site or email me.
You would not be able to download information or settings of two dive computers at the same time. I don't think thats what you were asking, but I wanted to clarify it just in case. These connect to a serial port. I don't know of any offered that connect to a usb port. Either computer would be a good choice, but since I own a cobra, I obviosly am biased towards suunto. Also, if it is of any importance to you, interfaces for suuntos generally are cheaper or can be anyway in that you can build one yourself from readily available and pretested plans.
You would not be able to download information or settings of two dive computers at the same time. I don't think thats what you were asking, but I wanted to clarify it just in case. These connect to a serial port. I don't know of any offered that connect to a usb port. Either computer would be a good choice, but since I own a cobra, I obviosly am biased towards suunto. Also, if it is of any importance to you, interfaces for suuntos generally are cheaper or can be anyway in that you can build one yourself from readily available and pretested plans.