HP 821154-001 TouchPad with NFC antenna is a replacement touchpad assembly identified for HP ZBook 15u G4 Mobile Workstation models. It provides the notebook’s touchpad controls and includes an NFC antenna.
This part is the NFC-equipped version; HP lists a separate touchpad part for the same workstation family without the antenna. The service guide shows the touchpad board connected by cable to the smart card reader board and by antenna connection to the NFC module. The identified part number is 821154-001.