The whites prizm 3 has no Tone ID. The 4 does. With the prizm 3, a silver coin signal will repeat at the "penny" indicator. However, I dug a seated liberty that held strong on Half Dollar. You'll have to experiment with your machine and as you go along you'll become familiar on how certain targets react. For instance, Indian heads will signal at "screwcap" and jump to "penny" due to the zinc content in the coin. Large cents will consistently signal at "quarter". Buttons vary, but the majority of buttons I have dug with the prizm signal at "screwcap". wITH A machine that has tones mode...a silver coin will typically have a high pitch solid tone. You can surely tell once you've experienced the sound of a silver coin with a machine that has tones.