The Makita DMR108 Job Site Radio runs on both an AC adaptor and Makita Li-ion batteries. It is equipped with Bluetooth (class 2), allowing for a wireless connection your mobile device for playing music with a range up to 10m. The two large 89mm speakers provide high quality sound. There is a USB port allows for charging mobile devices and a AUX-IN jack for connecting to external audio source (Connecting cable is not included). The elastomer bumpers protect against rough handling and have a falling impact strength of 1.0m. Other features include a digital tuner, AC adaptor jack, retractable antenna and is shower proof (withstands up to 5 minutes exposure to rain), IP64 rated. Supplied as a Bare Unit, No Battery or Charger. Newly compatible with 10.8V CXT slide batteries. NOT compatible with G-Series Battery or Ni-CAD or Ni-MH Batteries. Specification Frequency Range: FM: 87.5-108Mhz, AM: 522-1629kHz. Battery Type: Lithium-Ion. Battery Range: 7.2 - 18 Volt. Weight: 4.4kg.