What size screw thread is found on the bottom of the Yoyo (S)? April 11, 2024 10:10 The Yoyo (S) has an internal 1/4" 20 UNC screw thread. This is the standard for most speaker stands and mounts. Related articles Why does my Yoyo (S) turn off whilst music is playing? There is no firmware information available for the Yoyo (S) as these cannot be updated. Can I replace the battery for the Yoyo S? Yoyo (S) - Quick Start Guide How do I pair a device with my Yoyo (S)?