Special Features:

Battery m18 redlithium; weight 17 lbs; modes fm/am, aux, bluetooth; usb port 2.1 amps; charges all m18 batteries; 40 watt amplifier; reinforced roll cage and metal handles; weather sealed department; bottle opener

Properties:

An electronic device consisting of the necessary elements to establish the upper and lower limits and to effect the variation (continuous or in steps) of the frequency of a tuned circuit by means of an integral variable capacitor, inductor, cavity or line. It is generally used for tuning radio receivers, transmitters, amplifiers, or similar items. It does not include electron tubes. See also tuning unit, radio frequency.