JBL Tune 770NC Adaptive Noise Cancelling Headphone Color:Blue ER4XR adds 1-2dB to the

ER4XR adds 1-2dB to the mid-bass frequencies (below 200Hz) and 3-4dB to the lower-bass and sub-bass (below 100Hz)

Recommended Power Level - 1 - 4W

They are an aesthetical timeless classic and a natural technical beauty

a semi-precious stone with healing properties

Introducing JBL Tune 310C USB-C in-ear headphones

JBL Tune 770NC Adaptive Noise Cancelling Headphone Color:Blue ER4XR adds 1-2dB to theYour music, noise free. When your music is on, nothing else matters. The JBL Tune 770NC Adaptive Noise Cancelling wireless headphones deliver on that promise all dayand longer, while sparing you the unwanted noises. With up to 70 hours of battery life, youll easily get through a busy week of using them and still have enough JBL Pure Bass Sound to get you through the weekend. And if you do need a quick recharge, 5 minutes gets you an extra 3 hours of