This is an OTIS OEM brushed stainless steel luxury micro motion III pushbutton. The target profile is flat flush, it is a red LED, 24 volt button with an AMP four position connector, and clear front ring body also known as halo or light ring. Please note the locking nut, also known as the retaining ring FAA72N1, is not included with the button. The marking on the button will show AAA CH1, AAA CC1, or AAA AK1. Previous or alternative part numbers are AAA23500CH1 and AAA23500AK1. Parts may only be used and installed by certified licensed technicians.