• Casio MJ-100D PLUS-BK Solar and Battery Powered Desktop Calculator

• 300-Step Check: Review up to 300 sequential calculation steps using the forward and backward review keys.
• Recheck with Sound Assist: Compares a second entry of your calculation against the first. A buzzer sounds if you hit a different key, confirming typing errors instantly.
• Auto Review: Scrolls through your entire history automatically with a single button press.
• Localized Number Display: Switch between four separate digit separator formats, including Indian and western 3-digit comma markers.
• Dual Power: Solar-powered in normal light environments and battery-powered when lighting is insufficient