A Certified Refurbished product is one thats been returned to Bose, for any reason. Its then thoroughly inspected, tested, and serviced to meet strict Bose sound quality standards - the same as a new product. Appearance is closely examined; products occasionally have minor, nearly imperceptible blemishes. All Refurbished products have the same warranty as new products, and are available only from Bose. Quantities are limited. - Microphones: 8 Microphones, Built-in Microphone. Sound Options: Multiroom, SimpleSync. Audio cable included: No. Entire Product System: 8" H x 6.7" W x 4.3" D (4.75 lb). Product Material: Aluminum, Paint, Plastic. Wireless Connectivity: A2DP Bluetooth Aud - Bose Smart Speaker 500 - Power cord