LG 75” TR3DJ series can simultaneously use up to 20 points of multi touch. This function offers a lifelike board touch experience and makes collaboration much easier. With 1mm gap between the screen and tempered glass, which supports low parallax, The TR3DJ series can offer precise touch and excellent writing experience. The stylus pen comes in two different colors and with two different tip sizes of 3mm and 8mm. The dual pens enable users to write or draw simultaneously. The TR3DJ series allows you to write and annotate on all sources, so your writing experience can be easy and satisfying. Air Class supports connecting up to 30 students and offers interactive meetings for mobile devices on the same network, providing a variety of tools such as voting, answering, and sharing project texts. Air Class is easily accessible from the TR3DJ's main toolbar. The TR3DJ series supports OPS slots, allowing you to easily and conveniently mount an OPS device at the back of the digital board without the hassle of connecting to an external desktop, offering you more expanded functions. ScreenShare Pro enables you to show up to six shared screens or a file on a screen in real-time, and it has enhanced usability by allowing users to share Chromecast and Apple device mirroring on the same network without any additional application. TR3DJ supports Bluetooth wireless connections to various devices such as speaker, mouse, keyboard, etc. The TR3DJ series supports an embedded Android web browser, so you can search the web easily and quickly, without connecting to an external tablet or computer. The TR3DJ series supports built-in speakers in both sides of the front bezel which deliver high-quality sound and clear audio experience.