... built-in lithium battery -volume control buttons - Bluetooth v2.1 Flower design Bluetooth wireless headset for iphone A, play, pause functions ... lithium battery, 25 minutes fast charging;E, double track stereo, calls can be free to talk;F, volume ... compatible with iphone, ipad, notebook, computer, mobile phone bluetooth wireless connection;J, AVRCP remote control capabilities, the industry's highest ...