Features and Benefits:Industry's loudest, clearest sound systemStream high definition music wirelessly with Bluetooth from over 100ft.Compatible with the M18 and M12 systems featuring over 200 tools, or power with AC adapter 2 passive radiators maximizes clarity and volume of bass 2 high definition mid-woofers maximizes clarity at loudest volume The Milwaukee M18/M12 Wireless Jobsite Speaker delivers the loudest and clearest sound on or off the jobsite. The premium six speaker design provides unmatched clarity of sound with booming bass, clear mids, and sharp highs. Paired with a 40W dual channel digital amplifier, the speaker produces big sound to fill any room or work environment. Nothing But Heavy Duty construction features impact resistant side caps and a reinforced honeycomb grill to withstand drops and abuse. The latest Bluetooth technology ensures easy pairing with a smart phone, tablet, or other mobile device from up to 100ft away. Compatible with all M18 and M12 Batteries or able to run off of AC power, the M18/M12 Wireless Jobsite Speaker maximizes versatility, functionality, and performance to set a new standard in high-definition jobsite sound.