Check the listing for details. StarBT - Bluetooth adapter for Celestron NexStar GoTo mounts. Condition: New. Listed at 55.00 USD. StarBt - this is wireless adapter for telescope control systems such as Celestron. It can be used for rapid targeting telescope with mobile devices. IMPORTANT: 1. This bluetooth module is not supported by iPhone devices, etc. operating under the iOS operating system. For these devices, we recommend to use StarFi WiFi module https://www.ebay.com/itm/133953062289 2. No external power supply or batteries are required to power the Bluetooth module. TO GET STARTED: 1. Before turning on the power of the telescope, connect the Bluetooth adapter StarBt in connector RS-232 serial port on the hand controller and in AUX port on the mount. To connect the adapter requires an additional AUX port on your mount. If your Celestron telescope does not have an additional AUX port, you can order the Aux Port Splitter for Celestron https://www.ebay.com/itm/133953074355 - a compatible 6-pin splitter for branching the connection port of the hand controller. Currently, we know that the following models does not have an AUX port: LCM series и AS-GT (CG-5) Advanced GT series. Make sure your Celestron Nexstar hand controller have a compatible RS232 (RJ9 jack) inferface (located at the bottom of the hand controller) before buying this adapter. StarBt bluetooth adapter can be connected to the hand controller RS232 interface (RJ9 jack) only! It can not work with other interfaces (like miniUSB). If your hand controller have other than RS232 interface (RJ9 jack, located at the bottom of the hand controller) - buy a compatible controller first. 2. Turn the telescope. Spend a standard setting procedure recommended by the manufacturer of the telescope, namely enter into the remote location coordinates of observation, the current time and make alignment the telescope at the stars. Then turn on your mobile device Bluetooth mode and connect with StarBt Bluetooth adapter. During the connection, the device prompts you to enter the password - enter "1234" line and press OK. Telescope control on the sample of program SKY SAFARI: 1. After downloading the program, go to Settings, «Settings» button. 2. Scroll down to «Telescope» section and click on the «Setup» button. 3. Select the type of equipment used «Scope Type – Celestron ***» and type mount «Mount Type - Equatorial Goto (German)», if you select the azimuthal mount, respectively, «Alt-Az. GoTo », also select the wireless connection type in Section Communication Settings -« Connect via Bluetooth ». 3. Return to the main menu and press the Connect button. If done correctly, you will hear a pleasant sound, and the screen will display a crosshair with concentric circles showing where looking telescope, and on each side there will be buttons move the telescope along the axes of the mount. You can now direct the telescope at the object using a large database of celestial objects Sky Safari. For this use search - «Search» button and select an item from the list, then click «GoTo». It is also possible to direct the telescope at an object on the screen. For this you need to click first on it and then on the button «GoTo». For more details how to use all the features of the program, see its official Sky Safari website. In order to improve the quality of the product, the manufacturer reserves the right to make changes to the design and equipment without notifying users.