Systems and methods for monitoring and controlling remote devices are provided. A sliding holder is slidably installed at the tray to prevent the disc cartridge from moving by pressing the disc cartridge restricted by the locking lever in one direction. The system then determines whether the input video comprises static video. The reservoir may be a disposable plastic bag having markings for determining the amount of urine contained in the bag. The tray receptacle has an opening or interface configured to receive the tray module. According to the present invention, a process for producing a dialkyl tin compound is provided that subjects a composition of the deactivated forms of the dialkyl tin catalyst, formed when producing an ester compound, to an alkyl group redistribution reaction andor dealkylation reaction.