VocoPro VHF-3005 Dual Channel VHF Wireless Microphone System 4 wireless handheld mics included. 2 mic outputs, Individual Volume controls for precise vocal balancing Antennas provide clear RF reception. Quartz Lock for Drift Free Operation. Rugged 1 RU metal receiver chassis. Rack-mounting brackets included; Shipping Dimensions: 123/4" (L) x 171/2" (W) x 4" (H). Shipping Weight: 6 lbs. FCC license may be required