D Debra Audio D-440 Karaoke set is equipped with 4 wireless microphones and a receiver. There are 4-channel receivers with handheld microphones or lavalier microphones or headset microphones. Perfect for party, karaoke KTV, church, weddings, DJ, outdoor, stage, etc. High-quality dynamic cardioid capsules are specially developed to limit feedback and interference. Built-in high-quality chip in the microphone can provide clear and real sound. The 4-channel UHF wireless microphone receiver has 4 receiving antennas to improve the received signal. The high-quality test adopts anti-noise and anti-interference technology, which can remove the distortion. The all-metal receiver has independent volume control to achieve precise voice balance, and has a 6.35 mm (1/4 inch) audio output jack and 4 XLR outputs for easy installation. Suitable for all active PA speaker systems/amplifiers/mixers, etc. Standard size, the receiver is suitable for 19 standard rack.