I think the next size up would have been falling off of my feet. It is a black circle filled with red and a line through it indicating it is a swallowing hazard. If you test the microphone separately it may not seem brilliant but in real application (party chat) is sounds great, gives no static or echoes. Sound is great! The motorola chargers wear out because of the bending and warping of the chord. The base is a great support for people with foot problems. The second controller did not successfully pair to the PC. I can wear them for hours and forget they are there. A wired pair costing half the amount gives way better quality of sound so you are really paying for the bluetooth. Ive owned the original Kinetic road machine (foolishly sold that after an accident thinking I wouldnt be training again) and several other trainers and rollers over the years.