Built-in charger for quick convenient charging of all M18 batteries. Exclusive digital Bluetooth receiver streams audio wirelessly from over 100 feet away. 2.1 Amp USB (universal serial bus) power port enables charging of most portable electronic devices. Premium speakers and 40-watt amplifier produce a rich， full sound. Customizable equalizer and 10-station preset deliver personalized， enhanced sound. Reinforced roll cage and metal handles protect against abusive jobsite conditions. Weather-sealed compartment offers on-board protection for small belongings and a smart phone. On-board bottle opener for convenience on and off the jobsite. 16 In. (inch) auxiliary input cord and 2 AAA batteries included. Tool Only - no tool battery or charger included.