About the iOptron USB Cable... This iOptron USB Cable will help keep your laptop computer at a safe distance from the telescope when it is re-aligning. Recommended for the SmartStar-A-Series, SmartStar E-Series, and SmartStar-PR mount. It allows you to download firmware and database upgrades as well as to control your telescope via a computer. iOptron USB Cable Features... Keep your laptop computer at a safe distance from the telescope when it is re-aligning Allows you to download firmware and database upgrades as well as to control your telescope via a computer Recommended for the SmartStar-A-Series, SmartStar E-Series, and SmartStar-PR mount iOptron USB Cable Specifications... Equipment Type: USB Cable Application: SmartStar-A-Series, SmartStar E-Series, and SmartStar-PR mount iOptron Product Number: 8416