AEC BQ-621 Best-selling Portable Flexible Neck-strap Style Waterproof In-ear Wireless Sport Stereo Bluetooth 4.1 + EDR Hands-free Music Headphone Earphone Headset with Microphone Type: Bluetooth Headset App-Enabled: Yes Noise Reduction: Yes Ear Coupling: In the Ear Talk Time: Up to 10 hour(s) Music Time: Up to 6 hour(s) Charge Time: 2 Hours Bluetooth Version: 4.0