Compatible with the rest of the 2000 series wireless systems, SK2000 is a lightweight, robust bodypack transmitter.This lightweight yet extremely rugged bodypack transmitter is a delight for both the musician and the audience. With an AF frequency response of 25 to 20,000 Hz, it transmits even the sound of a bass guitar with rich fundamentals. Three RF output powers (four in the US version) provide longer transmission ranges or more channels per frequency range. The rechargeable batteries of the SK 2000 (optional) can be charged right in the unit using the external charging contacts.