The RS2 is consistent, even more durable, and offers a ton of range variety. Its Precision cut adds resistance and increased volume while allowing the latex to stay extremely reactive. This Call Creates a Full Range of Bull, Cow and Calf Vocalizations with Great Tone Consistency. The RS2 Small Domed Elk Diaphragm Call creates Low, Medium & High Tonal Range Vocalizations for Elk Hunting and Calling.