The BOSS DR-3 Dr. Rhythm is a game - changer for guitarists and songwriters. It lets you add amazing - sounding drums to your music easily. This budget - friendly drum machine comes with BOSS' top - notch acoustic and electronic drum kits, along with a nice selection of bass sounds. Ideal for jamming, the DR - 3's Rhythm Progressions and multiple variations make it a breeze to craft realistic drum tracks for any music style. With Total Sound Control, you can fine - tune your kits to get the perfect sound. Features include being BOSS' most affordable option for jamming or practice, having realistic drum, percussion and bass sounds with velocity - sensitive pads, new Rhythm Progressions with 3 variations for different parts like Intro, Verse, Fill and Ending, a new TSC with Sound Shape function and Ambience for professional - grade drum sounds, 100 Preset Styles and 100 User styles programmable via real - time or step recording, and a footswitch input for easy live control. It can run on AC or battery power. Specifications: Dimensions are 213 mm / 8 - 7/16' W X 185 mm / 7 - 5/16' D X 53 mm / 2 - 1/8 inches' H, weighs 710 g / 1 lbs. 10 oz., and comes with accessories like 6 Dry Batteries (Alkaline LR6 (AA) type), an Owner's Manual, and a Roland Service Information Sheet.

Using the BOSS DR - 3 is straightforward. First, you can power it up either with AC or by inserting six alkaline AA batteries. Once it's on, start exploring the preset styles or create your own using real - time or step recording. To jam, select a Rhythm Progression and its variations for different parts of your song. Use the velocity - sensitive pads to play realistic drum, percussion and bass sounds. The footswitch input allows you to control it during a live performance easily. When it comes to maintenance, keep the machine in a dry and clean place. If using batteries, replace them when the power gets low. And always refer to the Owner's Manual for more detailed instructions and troubleshooting tips.