What is the SR6 smart ring from felixx? The intelligent SR6 smart ring combines elegant design with high-quality materials. The SR6 is a stylish and practical accessory that uses sensors to record your health data. Energy-saving technology ensures monitoring for up to 7 days on a single charge. There are recording options for various sports. Available in sizes 8-12 in the colours gold (size 8) and black and silver in all other sizes. Thanks to a high-quality charging box, the ring can be charged simply and easily while travelling or directly on the ring using a second charging cable. The ECTRI app, which is available for Android 6.0 and iOS 11, offers different recording options for various sports.