The Akai RS-85 is a drum machine and rhythm programmer that was introduced in the late 1980s. It is a compact and affordable option for musicians looking to add electronic percussion to their setups.The machine features 20 preset rhythm patterns across a variety of music genres such as pop, rock, RnB, and hip-hop. It also has the ability to save and recall up to 17 user-defined rhythms, which is a significant improvement from its predecessor, the RS-80.One of the distinguishing features of the Akai RS-85 is its real-time pattern sequencing modes. This allows users to create custom patterns in real-time as opposed to step-sequencing patterns, a more traditional approach.In terms of connectivity, the RS-85 has a multi-function output jack for monitoring either internal or external sources and a headphone jack for quiet play. It can also be synced to other Akai RS series drum machines using the sync input/output, making it easier to create intricate rhythmic patterns.Overall, the Akai RS-85 is a versatile and affordable drum machine and rhythm programmer that offers real-time pattern sequencing, easy-to-use controls, and a wide range of rhythm patterns. It is a great option for musicians looking for an entry-level drum machine or as a companion to more complex setups.