The remote offers control over volume and a single multipurpose button for play, pause, skip, call answer/end/hold, Voice Control, etc. All three buttons are made from a soft rubber, and are each given a unique embossment to help distinguish them by feel alone.
The IDR655m come with a whopping total of 6 pairs of interchangeable silicone ear tips, with three pairs that use a single-piece design, and three that use a dual-flanged design. Each set of three are offered with small, medium, and large fittings.
The aperture of the chamber going into your ear is about 0.2 inch in diameter, giving it less leeway for small ears than in-ear headphones based around balanced-armature drivers, such as the Etymotic HF2, or Klipsch Image X5, but still a fairly typical fit for this price.