I've been looking for a reliable pair of outdoor Bluetooth headphones for several months and after trying a few I've come to the conclusion that this is the best option. Once you get used to the in-ear fit and the earbuds require a slight twist in the front of each ear to really fit, they fit perfectly. No previous earbuds could stay comfortably in the earbuds while running or at the gym. The app linked to the headphones allowed me to boost the low frequencies enough that I was happy with the tonal balance. I can still hear the outside world while running (that's what you want). Really clean mids and highs and no problems connecting to the iPhone. Would definitely buy again.
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