Compatible with 48-Inch Models: Radius S-Series RAS708GEM483C3 (S/N 402,082,300-406,294,345 & UP), RAS710CKC48300 (S/N 400,000,000 & Up). Compatible with 52-Inch Models: Radius S-Series RAS708GEM523C3 (S/N 402,082,300-406,294,345 & UP), RAS720GKC52300 (S/N 400,000,000 & Up), RAS720CKC52300 (S/N 400,000,000 & Up). This product is brand new and will come in original factory packaging. We are proud to be a factory authorized retailer. We use several different carriers and choose the most economical for the item and destination based on the estimated transit time displayed.