Medal, a typical Nepalese folk musical instrument which is very famous all over Nepal and is widely used. In other words, I would say a pure Nepalese hand drum in a cylindrical shape with two heads one larger than the other and slightly proven up in the center. The cylindrical tube is hollow inside and the stretched dry skin is used on both heads and tighten with long leather strings each other to bring up the quality tune.
A wooden is carved with hollow inside where stretched dry skin is used and some kind of black paste is placed in the skin on both side in a circle shape one larger than the other and leave to dry and is played by hand beaten on both sides. You can play faster or slow depending on songs and the rhythm.