Compatible with Sonos Era 300 speakers Stable surface reduces reflections and minimizes vibrations Designed to securely hold speakers in upright or inverted positions - not suitable for sideways installations Ball-and-socket joints swivel 15 degrees up or down and left or right, allowing you to place your speakers on an angle Discreet low-profile design ensures a sleek look without obstructing ports and controls 63mm (2.5") wall clearance allows for use with Sonos line-in adapters or combo adapters, sold separately Pair with Sonos Era 300 speakers in the same finish for a seamless look Includes hardware Dimensions (each): Width: 23.55cm; height: 11.58cm; depth: 9.6cm