High performance audio system with dual 3" speakers and passive radiators to deliver full-spectrum audio clarity. High reception accuracy and signal quality. Durable， portable， stackable design with shock absorbing polymer end caps and metal speaker grills to protect from drops， water， and debris on the jobsite. Integrated handles allow for easy transport and storage. Features weather sealed auxiliary compartment， customizable EQ (equalizer)， digital AM/FM processor， 10 station presets (5 AM/5 FM)， and 2.1A USB charger for portable electronic devices. Powered by M18 batteries (not included) or AC (alternating current) outlet. Up to 12 hours run time with an M18 5.0 Ah (ampere hour) battery. Tool Only - battery and charger not included.