Selectec Bluetooth Headphones over Ear In-Ear Stereo Universal Wireless Sports & Exercise Noise-Canceling Bluetooth Earbuds for Bluetooth Devices We use Bluetooth 4.1 and 4.0+EDR technology which makes the sound more stereo when you listen to music and pick up the phone. You don't have to worry about the noise around, because our headphones have a noise reduction feature. It allows you to listen to music and run with ease. 100mAh battery gives you more time.The standby time is long. You just need to recharge your headset up to 2 hours. It can standby for 250 hours. It supports you to talk for 7 hours or listen to music for 6 hours. These bluetooth headphones are suitable for bluetooth enabled devices. The working range is up to 10 meters. No materials bound, free your hands. You can do whatever you want. It contains Control button, EQ toggle button, Volume+, Volume- and microphone. Operate freely, easy to operate