The Profile Wireless 1-channel system includes all the core components freelance creators and videographers need to capture high-quality audio, including a 2-channel 2.4 GHz receiver, 1 clip-on microphone transmitter, versatile mounting and connection accessories, and a carrying pouch. You can easily turn the Profile Wireless 1-channel system into full 2-channel system by adding an additional Profile Wireless clip-on microphone transmitter and charging bar, each sold separately.