Reminder:<br />This earphone is RIGHT-EAR style only， and it won't work for left ear. Please kindly see that before you place an order. Thank you for your understanding !<br /><br /> - Bluetooth V4.1 earphone: Steady signal and lower power consumption. Effect wireless transmission distance up to 33ft/ 10m. CVC 6.0 noise canceling technology， allows you to talk clearly in noisy environment with built-in MIC.<br />- Light Weight: Less than 10g/ 0.35oz， light weight and compact， no burden to your ear， easy to store in your pocket and bag. <br />- RIGHT-EAR Wearing Design: RIGHT-EAR wearing style with adjustable 18°ear-hook， ergonomically close to the auricle of your right ear， provide all-day-long comfortable wearing experience.<br />- Tiny Body & Multi-functions: Support Voice Control by saying Yes/No to answer or reject the call to enable your safe driving and comfortable sports; Support in-coming call phone number reporting; Support one button(MFB) to Answer/Reject call or Pause/Replay song. Support to press Cycle Button to control Volume/Song.<br />- Long Battery Life and Great Compatibility: Build-in 55mAh rechargeable Lithium-ion battery， you could feel free to talk around 4 hours or enjoy music for nearly 5 hours after fully charged.<br /><br />Specifications:  <br />- Model Number: X16<br />- Bluetooth Version: Bluetooth V4.1 (Bluetooth Chip: CRS8615); Class 2.<br />- Supports HSP， HFP， A2DP， AVRCP， Apt-X protocol. <br />- Operation Range: up to 10 meters <br />- Frequency Response: 20-2000kHZ<br />- Impedance: 32Ω <br />- Sensitivity: 101.5db± 3db<br />- High-quality 3.7V/ 55mAh Rechargeable Li-ion battery<br />- Music Playing Time: about 5 hours (the volume will affect the time)<br />- Talk Time: about 4.5 hours<br />- Standby Time: 120 hours<br />- Charge Time: 1.5hours <br />- Charge Port: Micro USB<br />- Color: Blue & Black， Golden & White， Grey & Black， Red & Black (as shown in the picture)<br />- Earphone Weight: 8g/ 0.28oz<br />- Earphone Dimensions: 5.0 x 4.0 x 3.0cm/ 1.96 x 1.57x1.18in  <br /><br />Package Contents:<br />1 x X16 Bluetooth V4.1 Earphone<br />1 x Charging Cable<br />1 x Pair of Earbuds<br />1 x English User Manual