This dual-power desktop calculator runs on solar energy or a single Aa battery, can operate without batteries when exposed to sunlight or indoor lighting. It features an angled display that provides a comfortable viewing angle when set on a flat surface, helping to reduce neck strain by aligning naturally with your line of sight for a more relaxed user experience. Equipped with a 10-key pad with large buttons that follows the layout of a computer keyboard for easy use, this basic office calculator is ideal for daily tasks in offices, businesses, schools, retail shops, shopping centers, home workspaces. Available colors: Black, Blue, Green, Grey, Pink, Purple, White.