10 digit. Dual power. Auto shut-off. Pop-up display panel for easy viewing. Solar/battery powered. 1.5 volt battery included. Quick action keys. Soft comfort touch grip. Durable construction. 3-key memory for easy retrieval. Grand total key plus a mark up function key. Backed by the manufacturer's 1-year warranty. Please recycle. Unconditional Guarantee: If for any reason you are not completely satisfied by your purchase, simply return the product with proof of purchase for a 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. Made in Dongguan, China.