4K for Immersive 3D4K HD for clear presentation of every detail3D stereoimaging for visual feast at home just as in a cinemaTips on Pre-buried Cabling through A Tube01.Signal test and dust proof measurement are required before cabling, and slotting is strongly recommended. Please note that hard dragging, contorting, or knotting is not recommended to prevent the conductor from damage, which may cause attenuation or distortion.02.An amplifier or ferrite cores are applied to the lengths above 35m. Please note that these ones are directional. It’s strongly recommended that the connector well protected once buried in wall in case of damage, and the tube diameter above 30mm for cable installation or future maintenance.03.In cabling through a tube elbow, or you have to bend it in using , please note that the bending angle shall be no less than 90°to avoid damage to wire incurred by stress imbalance.