Etymotic ER4 XR Noise-Isolating Earphones with Etymotion Wireless Bluetooth Cable (Open Box) add glow tips The FD3/FD3 Pro benefits from

The FD3/FD3 Pro benefits from the numerous advantages of FiiO's new dynamic driver

Q15: DAC and Headphone Amplifier

4" Weight 550 g 1

0007% 800Hz 10kHz (4:1) XLR

making these the official upgrade option for your DIANA over-ear headphones

Etymotic ER4 XR Noise-Isolating Earphones with Etymotion Wireless Bluetooth Cable (Open Box) add glow tips The FD3/FD3 Pro benefits fromOver 30 years ago, Etymotic invented noise isolating, in ear earphones. Etymotics original design, developed for auditory research and hearing testing, used balancedarmature receivers and established these speakers as the true reference standard for high definition, in ear earphones. Paired with the new Etymotion Wireless Bluetooth cable these earphones are unstoppable and sound better than anything else on the market today. With built in