Yes this gong comes with a mallet.
The etchings on each of these gongs are done by hand by Nepalese craftsmen. No two of them look alike.
The etchings can be of various Buddhist symbols or designs.
As they are all handmade using a simple metal used for bells, you get a clean tone, with a decent amount of sustain. They are not regular bronze, like Chinese gongs.
They also all vary slightly in size - generally in the 9 to 10 inch range.
And no two of the gongs sound exactly alike either.
But this video sound sample gives you a sense of it.