m20 bluetooth earphone noise cancelling with mic deep bass 24hours working headset headphones wireless headset hd stereo earpiece earbuds

high compatibility: pairing with smartphones, tablets and other bluetooth devices is quick and easy. it can connect two bluetooth devices at the same time, allowing automatic connection after the first successful pairing. long-lasting battery life: built-in high-backup lithium battery 260ma high-capacity polymer, more than 24 hours talk time, 1000 hours standby, enjoying music streaming and hands-earplugs throughout the day.