Specifications：           Color: red/black/blue           Material: flexible LCD LCD panel; ABS frame           Size: 160 * 156 * 5 mm           Emissivity: 25-30%           Writing pressure: 200~300 (g)           Suitable temperature: '-10℃-60℃           Battery: CR1220/1.5 V           Calculator display :LED           Switch: intelligent automatic shutdown           Keyboard: silicon keys                       Notes:           1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.           2.Please allow slight deviation for the measurement data.           3.Don't soak any liquid.           4.To avoid scratches, please do not write on the board with sharp objects.                       Main Features:                Products made of high-quality flexible LCD LCD panel, the product quality is very good, very durable;              It can be used for drawing design, drawing, note-taking, communication, calculation, counting and so on;              Calculator writing board light and folding, easy to carry, calculator intelligent automatic shutdown function energy saving              The writing is smooth and can be erased repeatedly. One-key screen clearing function, low power consumption;              Very convenient to use, do not need ink, energy saving and environmental protection;              No radiation, harmless to the body, you can rest assured to use.                                   Package included:                 1* Calculator pad                 1*Pen (in the slot of the panel)