8 digit display with conversion chart. Durable construction with hard flip cover. Battery Powered. 1.5 volt battery included. Plastic comfort touch keys. 3-key memory for easy retrieval. Backed by the manufacturer's 1-year warranty. Unconditional guarantee. If for any reason you are not completely satisfied by your purchase, simply return the product with proof of purchase for replacement or refund, whichever you prefer. We welcome any comments or questions you may have. When writing, please include the 12-digit UPC number. Questions? 1-888-423-0139 Please recycle. Made China.