Which QCast product is compatible with TH683? BenQ Wireless Qcast Dongle (https://www.digitec.ch/de/s1/product/benq-wireless-qcast-dongle-funktionserweiterung-beamer-zubehoer-5661285) or QP20 QCast Mirror (https://www.digitec.ch/de/s1/product/benq-qp20-qcast-mirror-hdmi-wireless-dongle-funktionserweiterung-beamer-zubehoer-7726541)