THE GOOD: The Astrotec BX50 In-Ear-Monitor offers nice wireless sound via Bluetooth, a comfortable fit, and easily connects to your smartphones, tablets, laptops or any device which has Bluetooth. THE BAD: It doesn’t beat wired systems of similar price in terms of bass and overall sound quality, and the battery life of the BX50 isn’t very promising. THE BOTTOM LINE: The Astrotec BX50 is easy to set up and delivers decent performance for both movie watching and music listening, it is arguably the best Bluetooth IEM under $50 and an especially worthy investment for those who enjoy gym and jogging. It’s not easy being a Chinese headphone brand, with stiff competition from internationally leading brands such as beats, Monster, Sennheiser and Bose, as well as domestic rivals such as Sound Magic, Somic and Dunu, many Chinese brands just couldn’t survive after struggling for a few years. However, Astrotec manages to survive and even thrive in the headphone industry, releasing a wide range of IEMs and headphones every year, from entry-level models such as the $26.5 AM700, to the premium models such as the $628 AM1000, they just seem to have a solution for everyone.