You have to have some surface at the top of the brick for the clip to attach. Attached it to our keys and Amazon Firestick remotes with the gel cases. I was intrigued by this speaker, and as someone who wears AirPods or Powerbeats Pro a lot and can suffer from aching ears, was curious to see how this would be. Gute Qualität, Größe passt wie erwartet, sieht super aus It is through the app that you also get to control the various other funtions the speaker can provide. Overall, it’s nice & comfy but definitely only for lifting & low impact workouts. Sound quality is clear but bass heavy without playing with the EQUALIZER settings. They squeeze the head uncomfortably tight. Im out the entire purchase price. 5 my whole adult life.