A chillador is a very small guitar-shaped fretted stringed instrument, usually with 10, 12, or 14 metal strings, in paired or tripled courses. It is played in southern Peru and northern Bolivia. The chillador has 5 courses like its cousin, the charango, and has a similar tuning to the charango. The chillador is a common instrument of estudiantina ensembles, and is typically strummed rapidly, rather than plucked. There are several characteristics that separate a chillador from a charango: The chillador has a smaller scale length(31cm) than a charango(37cm); the chillador typically has 12 or 14 metal strings while the charango has 10 strings which are typically nylon; and the chillador has a flat back with laminated wood sides like a guitar, while the charango usually has a one-piece carved wood back or uses an armadillo shell. The chillador is an essential instrument of Kajelo music.