Line 6 XD-V55L Digital Wireless Lavalier Microphone System.XD-V55L from Line 6 sets a new standard in discrete lavalier wireless systems for performers and presenters. Offering spectacular audio quality, XD-V75L systems feature exclusive EQ filter modeling technology combined with a proven 4th-generation digital wireless platform, the most mature in the industry.XD-V55L gives you the flexibility to choose from three EQ filter models, enabling you to optimize your sound based on wherever you place your mic, or when plugging in an instrument. Using the selector button on the transmitter bodypack, you can easily audition and choose from available presets, so you can deliver your performance with maximum clarity and impact in every situation. The included premium lavalier is designed for the clearest sound and lowest possible handling noise. Unlike analog wireless systems, the XD-V55L does not use signal companding (compression and expansion) which can affect your vocal tone - the full 117dB dynamic range (A weighted) is available at all times, delivering a powerful, clear signal unmatched by traditional wireless. With 12 channels of 24-bit, 10Hz-20kHz, compander-free performance, the XD-V55L provides unmatched full-range audio clarity and license-free operation worldwide. Ensuring peace of mind and the most reliable performance, the XD-V75L operates in the 2.4GHz band, which is free from interference due to TV broadcast, public safety announcements, cell phone towers and other transmitting devices. Encoded DCL (Digital Channel Lock) technology prevents reception of any audio interference from other 2.4 GHz devices and ensures signal integrity.