( JPEG format )A hammered string instrument consisting of a trapezoidal wooden box with metal strings stretched laterally over it. There are both bronze and steel courses ( tuned low and high,respectively ), with movable bridges placed on the left and right sides underneath alternate courses. The steel courses are divided by the bridges in the ratio of 1:2, so that there is an octave difference between the sounds produced by the instrument on top of a small desk, and strikes the strings with beaters held in each hand. A tremolo technique is employed much of the time. Used in performances of classical Persian music. This item was made in the 1960s by H. Malek.