The frequency, battery indicator, and signal strength bar are clearly and intuitively displayed on the LED screen. Built in dual antenna that resist to WiFi and electromagnetic wave, etc., features of anti-jamming and has longer transmission distance(30m). 24-bit/48kpbs high resolution, with Mic/Line two modes to switch from. Strong, stable and fast receiving signal.Small wireless transmitter system, lithium battery inbuilt, plug and play, easy to operate. Equipped with XLR female to 6.35mm male microphone adapter, compatible with audio mixer, recorder, speaker, PA system, amplifier, etc. Provide stable and reliable wireless transmission. Number of Channels: 6 Transmission Distance: About 30 meters Duration: Stable 6 hours Power Supply: Built in USB charging Delay: About 5ms Sound Dynamic: 110dB Sampling Rate: No 24bit / 48 kpbs audio Frequency Response Range: 20Hz-20kHz Antenna Impedance: 50Ω SNR: 110dB Battery: 3.7V 400mAh Li-ion battery Support Microphone Types: Dynamic microphone and condenser microphone with built-in power supply Colour:As Shown Material:ABS Package Contents: 2 * Micphone Transmitter