Type: Bluetooth Car kit Noise Reduction: Yes Talk Time: Up to 20 hours Standby Time: Up to 700 hours Charge Time: 3 - 4 hours Operating Range: 33 Feet Battery: 3.7V Rechargeable Lithium Ion Battery Specifications: CE, FCC, BQB, Ctick, RoHS/WEEE Compliant Micro USB Connector 3GPP with DSP solution