RUNOLIM Hybrid Active Noise Cancelling Headphones, Wireless Over Ear Bluetooth Headphones with Microphone, 70H Playtime, Foldable Wireless Headphones with HiFi Audio, Deep Bass for Home Travel Office

ADVANCED ACTIVE NOISE CANCELLATION: Our RUNOLIM hybrid active noise cancelling headphones have been proven to effectively reduce external ambient noise by up to 95% in over 10,000 experimental results. This allows you to enjoy pure music and focus on your work, whether you are in a noisy street or a coffee shop.(Note: The active noise cancelling function is unavailable while using 3.5mm audio cable. You should use Bluetooth mode for ANC function.)