This video demo's using iambic paddles that are plugged into a spare usb mouse in order to use its left and right buttons, to be activated when you close your iambic key's dit or dah paddle, with AD5DZ 's WebRTC MORSE CPO browser APP.
His webpage keys a web audio generated morse code practice oscillator. You can use just your mouse's left and right mouse buttons to key the dits and dahs, or plugin your iambic paddle to a converted spare usb mouse and use your iambic paddles to close the microswitches of the mouse buttons for dits and dahs. You just have to hover your mouse cursor over the keying area of his webpage.
Very impressive timing and well constructed morse code audio tone cw notes are created by his WebRTC web audio coding.
MORE INFO HERE:
you can also use MIDI INPUT for his browser based, code practice oscillator...using MIDI hardware boards like the TEENSY..
see here for more info