Bluetooth is a universally used technology for exchanging data (music + audio) over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices.
While the range of Bluetooth is 30+ feet, the optimal range for any headphone brand with Bluetooth is 2 feet from the phone or device, particularly outdoors when the signal cannot bounce off walls and ceilings. This applies to all brands of Bluetooth headphones and earbuds.
JLab Epic Bluetooth Earbuds have the antenna in the power/on-off and volume track controls, which is on the right side of the earbuds. The ‘JLab’ text should face away from the body for best results.
Three elements can affect your signal/sound/loss of transmission and produce cutting out audio for any brand headphones: 1. Device (phone, computer, MP3), 2. Headphones, 3. Your environment.These elements may interfere with your Bluetooth signal:
Because Bluetooth is a short-distance radio transmission, it must travel to get somewhere (think of how sound travels). Water, liquid or moisture are some of the hardest elements for a signal to travel through and offer the most resistance; similarly, a person’s body, is also one of the hardest elements for a signal to travel through.
Learn more about Bluetooth technology here: http://www.bluetooth.com/Pages/Fast-Facts.aspx