Review on 🎧 ISOtunes Original Noise Isolating Bluetooth Earbuds: 26 dB Noise Reduction, 4 Hour Battery, OSHA Compliant by Angie Zhang

First, they are like disposable earplugs. For reasons of hygiene and efficiency, they should be discarded every few shifts. $15 for just three pairs of drilled foam earplugs; it can get expensive. Artificial noise attenuation has been reduced by ingesting earwax. I had to put 33dB muffs on them. Second, the warranty is only one year. One of my buds shorted and snapped after only 18 months. Third, a noticeable blinking of the blue "on" indicator. Even with the plugs unplugged and the magnets connected, it still flashes! It's unprofessional during a security briefing. I also avoid unwanted attention (e.g. cynical bosses, gossips, etc.). I wrapped it with electrical tape. Fourth, the rubber covering the USB charging port came loose during normal use. I generally cannot recommend this to operators of industrial plants (e.g. factories, oil fields, etc.). I work with 4160V engines, gas compressors, internal combustion engines and turbines. If you bought them they work great with hitches over them. Until one of them fails immediately after the warranty expires. For $60 and expensive parts I expected a little more.