Vention professional HDMI cable, built-in smart chip signal amplifier, 40m Product SKU:2247 Model:VDH-A01-B4000 Version:Support 3D 1.4v Type:Male to male Connector:Standard 24k gold plated plug Conductor:99.99% oxygen free copper,standard 19pin Shielding:Aluminum foil + multi-shielded anti-jamming material Jacket shell:PVC environmental material Length:40m Weight:4.374kg Flame Rating:VW-1 UL Standard:AWM 20276 Built-in smart chip signal amplifier