The design of the earphones are pretty standard, they are connected via a flat cable with the controls dangling from the right ear. The microUSB plugs directly into the rear of the right earphone. The earphones themselves are an aluminium casing, and are a good size, but not too big.
They come supplied with a decent quality carry case, and more importantly you get a good selection of ear tips, including small medium large and some foam comply tips.
Contents of Brainwavz Blu-100 box
However, I had a few issues with the fit of the tips. I struggled quite badly to get them to stay in during normal movement and struggled even more with exercise. One possible cause for this could be the earphones section themselves are quite long, so stick quite far out of your ear and I assume have a centre of gravity further away from your ear. I did manage to improve the fit with some minor adjustments.
The Blu-100 uses two 8mm dynamic drivers and has an impedance of 30 Ohms and it operates in the frequency range of 20-20,000Hz. Getting a good sound out of in-ear headphones is reliant on getting a good fit with the ear tips so it took a little while for me to get there. Once I had a decent fit I was rewarded with a good quality sound. The mids and highs are nice clear and refined, there was no harshness when then volume went up. Combined with the decent level of bass I found these worked well for my gym sessions, and they seem to be well protected for sweat.
Battery life is reasonable, I managed 3 and 4 hours with normal user.
Brainwavz Blu-100 tips
The Brainwavz Blu-100 earphones are well within the budget range of wireless other branded earphones. Although they are sold at a budget price, you do still get good quality sound, the BLU-100 comfortably punched above their weight and in a world where 3.5mm sockets is slowly disappearing, these are a sound investment to adorn any new smartphone.