No blue light. Eyes protect LCD writing tablets with highly sensitive pressure sensitive technology and sleek. flexible LCD screen. The lines are clear and noticeable. The screen does not light up itself and its optical writing properties correspond to those of paper. No dust. no ink. no radiation. safe and hygienic. Fall protection. waterproof IPX3. More durable Use the special impact-resistant ABS material. that is more drop-proof and is not damaged by daily splashing water. However, do not immerse the LCD writing surface in water. It's more reliable to use and more durable. Stretchable elastic rope. Preventing Pen LossBearing in mind the fact. that the pen is randomly placed during use and causes loss. We have equipped our LCD writing board with a stretchable elastic cord. so that the pen is not lost. Low energy consumption. Built-in CR2025 button battery. LCD screen without power consumption. uses very little power when clearing the screen. No frequent battery changes required. more convenient. Best gift. Wide Applications It is a perfect gift for kids students. Designer. Businessman. Teacher. Students and artists. And it can be used as a note board. Also to help people with hearing loss.