Material: ABS+ Electronic Parts Input Pressure: 10~20 GInput Voltage: AC 36V Frequency: 1Hz Size: 28x18.5x0.5cm Power supply: 1 x CR2020 button battery Weight: About 180g Mild color, no harm to your eyes, no radiation. Suitable for writing and drawing, home message, etc. Pressure sensitive, easy to use and play. Clear screen with just one button. Ultra thin and lightweight design, convenient to carry. Energy saving design, no battery needed for display. Special and creative color display