☛Easy to use, large display☚:All products with ies have passed the test,caution! ! ! Be sure to install the y to use It install ies to avoid unpredictable errors, one Y of this product,12 digits, better field of view, corners of the eyes, upright LCD screen; automatic shutdown (not used for 10 minutes). ☛Non-slip design☚: Non-slip washers are not easy to slide during operation. ☛Durable silicone button☚: good sense of touch, ABS material, Light weight. Reasonable configuration and comfortable operation. ☛Solar and y Dual Power ☚ Solar and backup ies keep the desktop calculator working in low light conditions. The calculator can handle solar energy, have a 1.5v y . ☛100% AFTER SALE SEVICE☚We provide a return policy for you to ensure you 100% satisfaction. Would you have any questions to our product, please feel free to contact us and we will give you a quick response.