Car Audio & Video. Rockville RWM90U Quad UHF Handheld Wireless Microphone System with Metal Casing. Condition: BRAND NEW IN ORIGINAL PACKAGING. Unboxing Video of RWM90U. 4 wireless handheld microphones. Rockville RWM90U UHF Quad Wireless Microphone. High performance wireless handheld microphone system. Includes transmitter with four high sensitivity, unidirectional, wireless, handheld cardioid microphones. Featuring a dual […]... Read More