B&O BEOPLAY H4
$399 bang-olufsen.com/en
CRITICAL SPECS
40mm driver; 20 - 20,000 Hz frequency response; Bluetooth 4.2; 19-hour battery life; 235g
CRITICAL SPECS
40mm driver; 20 - 20,000 Hz frequency response; Bluetooth 4.2; 19-hour battery life; 235g