4K DisplayPort to HDMI Cable, DP to HDMI, WARRKY [Gold-Plated Plug, Aluminium Shell] Nylon Braided Uni-Direction Display Port Computer to HDMI Monitor, Compatible with Lenovo, HP, DELL-1.8m/6ft: Amazon.co.uk: Computers & Accessories
HDMI Splitter 1 in 2 Out, 4K HDMI Splitter for Dual Monitors Duplicate/Mirror Only, 1x2 HDMI Splitter 1 to 2 Amplifier for Full HD 1080P 3D with HDMI Cable (1 Source onto 2 Displays) - Newegg.com
Type and how to choose - ELECOM CO., LTD. of display cable