Unified IP Phone 500 Series Non-locking wall-mount kit
Cisco IP Phone 500 Non-Locking Wall Mount Kit, Unified IP Phones 521G, 521SG, 524G, 524SG.
Cisco IP Phone 500 Non-Locking Wall Mount Kit. Compatibility: Unified IP Phones 521G, 521SG, 524G, 524SG.