Operates as a clip-on microphoneBuilt-in omnidirectional condenser microphoneAll-new Series III 2.4GHz digital wireless transmissionUp to 70m range (line-of-sight)TX and RX have built-in rechargeable batteries, charged via USB-CUp to 7 hours on a full charge, including a battery-saver modeSuper-lightweight and ultra-compact TX and RX (only 31g)The transmitter and receiver pair in just 3 seconds3-stage output pad: 0dB, -12dB, and -24dBUse up to 8 systems in one location