Sell Solar calculator 12-digit calculator 120 Steps check &correct calculator best price

new Solar Calculator 12 Digit Calculator 120 Step Checksum Calibration Calculator 12 digits ct-866 product detailed information Regular percentage-regular percentage calculation. Size; 10.3 cm * 15 cm Color; black white red blue Two-way power supply (solar + battery)-when the light is sufficient, it is powered by solar energy, and when the light is insufficient, it is powered by the battery. The key flip key operation is stored in the buffer, so no content is lost even during high-speed input. Large display-The large display makes more data easier to read. The designed and manufactured plastic key is easy to operate. All the marking functions of the marking adder can simplify the calculation of costs and profits.