In my understanding and partial usage of brands, octagonal: SF8008 series, Gigabelue: Ultra HD Quad4K, Ultra HD UE4K, Ultra HD Trio 4K, UHD IP4K, Ultra HD Trio 4K Pro series, Amiko series, Abcom: PULSE 4K, PULSE 4K Mini series, Uno4K, Uno4KSE, Duo4K, Ultimo4K, Duo4KSE series, Zgemma series are...