Rockville RWM1203VS is a high-performance wireless microphone system that includes two hand-held, lavalier, or headset microphones with a dual filter design to limit feedback and interference. It offers a wide operating range of 100-200 feet indoors and 65-165 feet outdoors, making it suitable for various applications. The system features a durable composite microphone construction and a comfortable ergonomic design for ease of use. With a carrier frequency range of 180-280MHz, it ensures reliable signal transmission. The receiver has a sensitivity of >2mV and an audio output level of 0-0.