What is "jhallari"

The jhallari, also known as gethuvadyam, is a string percussion instrument from South India. It consists of a large resonator (kudam) carved and hollowed out of a log (usually of jackwood), a tapering neck of 1 to 2 feet long, a string tuning box and four metal strings attached from the kudam to the tuning box. Jhallari strings are played with two small wooden or bamboo sticks, one on each hand, to create rhythmic patterns or a percussive development.