The Countryman H6OW6TSR is code for compability with the Sennheiser Evolution Series (G2 and G3), EW 100, EW 300, EW 500, SK 1093, it has an (O) Omnidirectional pattern, (W6) indicates the gain is set for speaking and vocals, and (T) lets us know the color is Tan. The H6 Headset is the lowest profile headset microphone in the world. Combining the transparent sound quality and water-resistant capsule design of the E6 Earset with a comfortable, lightweight, and easily adjustable headframe, the H6 Headset is perfect for houses of worship, theaters, broadcasters, and presenters.