iKross Bluetooth Speakerphone Handsfree Visor Car Kit + Car Dashboard Windshield Mount Holder for Apple iPhone 6 Plus, iPhone 6, iPhone 5S, iPhone 5C, iPhone 5, iPhone 4S, iPhone 4 Bluetooth Version 2.0+EDR. Echo cancellation and noise suppression. Voice dialing fuction One touch answer, call rejection, last number redial. Advanced Built-in microphone and speaker Full duplex sound quality. Bluetooth Profile Supported: Headset & Hands-Free Profiles Operating Frequency Band : 2.402 to 2.480GHz unlicensed ISM band. Talk Time: 8 to 10 hours. Standby Time: 450 hours. Normal Charge Time: Approx. 2-3 hours