Caddx Ratel 2 V2 FPV Camera 2.1mm Lens 16:9 4:3 NTSC PAL Switchable

TV System: NTSC & PAL (switchable). Versatile lens options with a 2.1mm lens for various shooting scenarios. Can I switch between NTSC and PAL?. Is the lens interchangeable?. Lens: 2.1mm. Regularly clean the lens for clear visuals.