Fire TV Stick Lite 個 hdmi pass through係咩來?

想請問一下佢個HDMI 咩 hdmi pass through

同一般個HDMI有咩分別?

因為想買,我電視有出解碼出擴音再出喇叭,會唔會食唔到要用返電視內置喇叭?

平時駁HDMI野沒事有聲 (PS4, mytv box)