Celestron Hand Control, Flashable, for Advanced, CGEM and CGE Pro Series Computerized Telescopes New Celestron 93989 Hand Control (ADV, CGEM, CGE PRO) Celestron Telescope Hand Control for Celestron Advanced Telescopes, Celestron CGEM Telescopes, Celestron CGE Pro Telescopes LCD is less sensitive to low temperature Directional buttons have raised edges to make them easier to find without looking at the hand control Support for faster updating via Celestron's new firmware management software