The TR100 calculator is the perfect assistant for precise calculations, whether on the go or in the office. It operates on solar power and automatically shuts off after 5-12 minutes to save energy. A pre-installed LR1130 battery can be replaced if needed. With its compact dimensions of approximately 7.3 x 11.7 x 1 cm, the TR100 is lightweight and portable. The protective cover can be fully flipped over to shield the calculator from scratches and damage. The easy-to-read 8-digit display ensures simple operation. Additionally, the TR100 offers practical features such as square root and percentage keys, as well as a memory function for addition, subtraction, recall, and deletion.