12 Digits, backspace key, grand total, regular percentage calculations Two-way power (solar and battery): Solar powered when light is sufficient, battery powered when light is insufficient Key rollover: Key operations are stored in a buffer, so nothing is lost even during high-speed input, plastic keys: Designed and engineered for easy operation Extra Large display: Larger display makes more data easier to read, product dimension:26.2(H) x 105(W) x 144(D) Country of Origin: Philippines