On the left side of the IBT-C04, we find a large rubber section that is ribbed for added grip. Just above that, we find three buttons, one to accept a call, one to turn the volume of the speaker up, and one to turn it down. We also see that this area is surrounded by very shiny black plastic to mix up the textures a bit.
Looking at the heel of the mouse, we see the center section of the IBT-C04 is textured all the way from the heel right to the right and left click buttons at the front. Where the top and bottom halves come together, there is a tiny hole for the microphone, but with all the black on black, it is almost indistinguishable in this image.
Moving up the heel of the mouse to the top section, we run into four larger oblong holes surrounded by rays of tiny round holes to allow sound from the speaker underneath to pass through.
The right side of the mouse has the shape of the rubber insert the left side offers, but this time the entire side is molded from that shiny black plastic. While it would appear to be slick and hard to pick up, there is an inward angle to this side that makes grabbing it much easier.
From the front of the IBT-C04, we can see the camber of the design for a more ergonomic feel during use. As you move left across the front as oriented in this image, the center is the furthest point forward, and gently curves to both sides. The lower section of the front is where the charge port is located; this is where you plug the cable into the IBT-C04.
Between the two main buttons, we find the DPI adjustment button in front of the clear, rubber banded scroll wheel. Behind that is where SEENDA puts its name, and for added design, the left and right buttons have been stepped down with defined body lines.
The last bit to cover outside of the IBT-C04 is the underside; this there we find three PTFE feet to support and allow this mouse to glide upon. The large section at the base is just a screw cover, and not a foot. Near the top, we have the optical sensor eye, and switches to either side of it.
As for the tiny switches, the one with speaker icons enables the Siri voice, and turns Bluetooth on and off. The lower switch is for the IBT-C04 power. If the lower switch is on, the mouse still works, no matter the position of the audio switch.
Read more at http://www.tweaktown.com/reviews/6854/seenda-ibt-c04-wireless-bluetooth-music-mouse-review/index3.html