The Panasonic CN-S310D is a car audio head unit with a large display and various connection ports. - Brand: Panasonic - Model: CN-S310D - Voltage: DC 12V - Audio Technology: MP3 Layer 2 audio coding technology - Connection Ports: Multiple connection ports - Screen Size: 7 inches Full Seg, Bluetooth Thank you for viewing. It was working properly without any problems until it was removed, but as it is an item that has been used for several years, we cannot guarantee its operation after purchase. Please understand this before purchasing. The screen is in good condition with no scratches. We can also provide a new film antenna for an additional fee.