The Lenkeng LK-LKV388-Dongle, HDMI wireless extender allows the user to transmit and extend an HDMI signal up to 50 metres away wirelessly in an office or boardroom environment, it has a strong anti-interference ability by running at 5GHz operation frequency and supports point to point connection. IR passback with 20-60KHz frequency helps to remote control the source device from the receiver side. It is highly reliable and a perfect solution for meeting rooms, conference halls or auditoriums. Note: *Transmission distance will be different due to the environment **Wall, brick or glass will shorten the signal cover range or cause big signal loss