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. 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. Support with dynamic microphone and condenser microphone with built-in power supply. compatible with audio mixer, recorder, speaker, PA system, amplifier, etc. Provide stable and reliable wireless transmission. Color: Black Material: ABS Package Contents: 2 x Microphone Transmitter 2 x Microphone Receiver 2 x USB Cable 4 x Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.