Sennheiser SKM 9000 wireless microphone system.
This is a professional wireless microphone system with four handheld microphones and a receiver.
It uses UHF technology and is designed for reliable transmission and excellent sound quality.
The system includes features like an LCD display on the receiver to show frequency and signal status, as well as a digital pilot technique and noise-locked functions.
The system is compatible with various microphone capsules from other Sennheiser series.