Size: 16.53 * 10.32 * 1.47cm Material: plastic Color: Black Specifications: 12-bit Calculator 1: Super Screen and Font to Clearly Observe the Calculation Results 2: High-Penetrating Acrylic Plate Protection Display Panel, Protect The Screen, Not easy to Draw 3: Battery + Solar Dual Power Drive, long-la casting, Long Working Hours 4: Do Not Use It Automaticly, Extend The Service Life of The Machine, Save Energy 5: One Million Button Life, Use Plastic Buttons, Comfortable, Hard to Wear 6: Four Bottom Corners with Non-Slip Cushion, Smooth Use