1. Aspect Ratio: 4:3 and 16:9 are available. 2. Digital pens: three color pens eraser 3. Wireless: support 30meters wireless o Board Features 1. Touch Technology Infrared Touch,write or touch by finger, pen, teaching pointer or any other opaque object.2. Boarda. Writing aluminum honeycomb board, strong, anti-scratch, anti-glare (PVC, porcelain board for choices).b. Slope infrared cover on the ...