Oduo CR16SP Bluetooth V4.1 Sports In-Ear Headphones Bluetooth 4.1 HD Voice technology ensures a crystal clear Bluetooth stereo headphones audio experience. Noise-Cancellation Headset. Oduo CR16SP earphones preserve the quality of your voice while muting background noise. Embedded microphone for hands-free Communication. long hours music playback time. 150 hours earbuds standby time. Package includes CR16SP Bluetooth earphones, different size ear cushions, charging cord.