Bluetooth 4.1 Car Speaker Wireless Handsfree Multifunction include Bluetooth Pairing, Voice Dialing & Voice Prompt and other advanced features Bluetooth 4.1 technology Handsfree Wireless Car Speaker Features include Bluetooth Pairing, Voice Dialing & Voice Prompt, Call Answer, Call Reject, Caller ID, Noise Reduction (DSP Technology), Echo Cancellation (CVC Technology) and Mute Works with Apple, Samsung, Nexus and other mobile devices One year manufacturer's warranty included