The dual-mic array reduces background noise so the focus is firmly on your voice. Full-duplex audio function for natural conversations without missing a word. Charging function: The speakerphone can be connected via the in-built USB-A port or using the included USB-C adapter. Cable length: - 715 mm Please note: We recommend the Poly Plus Service for this product. The Plus Service includes the following: - Software upgrade and updates - Spare part service - Next business day - Poly Online Support Center access - Technical escalation support - 24 x 7 technical phone support - Priority technical support - Ecosystem Cloud Partner (ECPS) support - Network diagnosis tests, e-mail notifications - Discount on Professional Services - Poly Lens premium features - Enhance support calls with live video diagnosis The service can be extended.