Dual power ways: Solar power or 1 AA battery (Battery Included), energy saving and convenient. Adopt Japanese LCD screen, 12 digits, display data clearly.
Lightweight Solar and Battery Calculator – 12 Digit Display for Office and Home
Auto Shut-Down: Automatically powers down after 8 minutes of inactivity, ensuring longer battery life. Lightweight Solar and Battery Calculator. Dual Power Options: Solar power or 1 AA battery (battery included) for energy efficiency and ultimate convenience.