... -in lithium battery -volume control buttons - Bluetooth v2.1 Flower design Bluetooth wireless headset for iphone A, play, pause functions ... to talk;F, volume control buttons, can be large and small volume adjustment;G, disposable to code, intelligent memory, ... : Asynchronous: 3Mbps (Max) Synchronous: 433.9kbps Safety features: Authnticaton and encryption Supported: HSP, HFP, A2DP, AVRCP, HID, FTP, Dial ...