Blastking MHU404 Four Handheld UHF Wireless Microphone System
(4) UHF Antennas. (4) Wireless Microphone. Super Anti-Jamming Circuit Design. Plastic Carrying Case. 100-240V AC Power Adapter. Frequency Response: 50Hz ~ 15 KHz. Total Harmonic Distortion: < 0.5 %. Audio Output: Balanced Type 0~±500mV Mix Type 0~±300mV.