[ENC Mic] This bluetooth wireless headset adopts advanced ENC technology (Environmental Noise Cancellation). By calculating the frequency band of environmental noise in advance, it can prevent the listener from hearing your background noise, which is perfect for remote work.[Bluetooth 5.3 andamp; Connect 2 Device ]The Newest Chip of V5.3 provides 33 feet / 10 meters of ultra-long distance transmission, free from the limitations of space, more stable signal and faster transmission. The single ear wireless headphones can connect 2 devices at the same time, allowing you to easily and quickly switch call modes while watching or working.Let you enjoy the freedom of wireless![Ergonomic Design]Bluetooth Earpiece Full In-Ear with Ergonomic Design for Business, Office, Driving and Trucker; The ear hook is made from a soft and flexible rubber material, conforming to the shape of your ear and providing excellent comfort. The retractable ear hook and flip-boom arm swivel and Rotatable earplugs allow you to switch between left and right ears at will.[Hands-Free Call]This bluetooth headsets can easily control button to answer/reject/end/redial the call, music play/pause, previous/next track and switch the audio to cell phone/headset.Four different sizes of ear tips are available to meet your different needs.[Great battery life]With up to 12-15 hours of continuous calls and up to 15-30 days in standby mode, This Bluetooth earpiece lets you make reliable wireless calls throughout the day on a single 1.5 hours quick charge.color:blackMaterial:plasticPackage Contents:1 x Bluetooth HeadsetOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.