Before Alignment of the telescope must first be accurately set the time and position. Scope Friend uses the GPS function and Bluetooth to both the exact time and the position of the telescope hand controller to transmit and shows how large the differences are. Requirement: - Currently only Skywatcher and Celestron NexStar telescopes Synscan (Scope Friend 1. *) - Bluetooth retrofit for your telescope under http://astro.marxram.de - Android device with Bluetooth (BT SPP) functionality - Activati