Line 6 XD-V30L Digital Wireless Beltpack System with Lavalier Microphone 4th-generation technology; Exclusive digital technologies deliver wireless performance, signal reliability, simple set up, operation, and sound quality superior to analog wireless systems 2.4GHz broadcast successfully avoids interference caused by TV stations, public safety broadcasts, cell phone towers, and other high-powered sources; 6 always-available channels; 30-meter/100-foot range Crystal-clear and responsive vocal reproduction with full-range 10 Hz  20 kHz (-2 dB) frequency response, wide 120 dB dynamic range (A weighted), superior transient response, and 24-bit digital conversion Road-worthy polycarbonate transmitter and receiver chassis; Internally mounted antennas FCC compliant; License free; Immune to the current FCC Consumer Alert regarding wireless microphones; Includes beltpack transmitter, low-profile receiver, lavalier microphone, protective carrying case, two AA batteries (8 hours of battery life)