... A large mini handheld wireless keyboard, trackball mouse, combined with laser presentation pen in one of the 70 keys. 2. ... pointer Keyboard, mouse, laser pen Trinity, three-dimensional presentation of teaching, more vivid! 4, with a real notebook Touchpad Capacitive ... pointer Keyboard, mouse, laser pen Trinity, three-dimensional presentation of teaching, more vivid! 8, with a real notebook Touchpad ...