It sounds like you’ve come across a reference to the — likely a remote control unit for a piece of consumer electronics, possibly a camera, projector, audio device, or lighting equipment.
Are you connecting to any (Roku, Apple TV, Firestick)? px-rc1 remote control manual
To clear all learned commands, press and hold 1 and 6 for five seconds, then enter the code 9 9 9 1 0 [ 0.5.8 ]. It sounds like you’ve come across a reference
The PX-RC1 remote control consists of the following components: possibly a camera
The code you programmed may only offer partial compatibility. Repeat the setup process using an alternate code from the manual or execute an Auto Code Search to locate a more accurate profile. The Indicator Light Blinks but the Device Doesn't Respond