other debris that could be on the disc as it is extracted. Once the caddy has been withdrawn by the person, the player loads the disc onto the turntable, either manually with all SFT and most SGT prefix RCA players or automatically with the RCA SGT-250 and all other models and brands of players. When playback has been started, the player spins the disc up to speed while moving the pickup arm over the disc surface and lowering the stylus onto the beginning of the disc. When Stop is pressed, the stylus is lifted from the disc and returned to its parking location, and the disc and spine are lifted up again to align with the caddy slot. When ready, the slot is unlocked, and the caddy can be inserted and withdrawn by a person, now with the disc back inside. Advantages CED players, from an early point in their life, appealed to a lower-income market more than VHS, Betamax, and LaserDisc. The video quality (approximately 3 MHz of luma bandwidth for CED) was comparable to or better than a VHS-SP or Betamax-II video, but sub-par compared to LaserDisc (about 5 MHz of luma bandwidth). CED players were intended to be "low-cost" because they cost around half as much to manufacture as a VCR and had fewer precision parts. The discs themselves could be inexpensively duplicated, stamped out on slightly-modified audio LP record presses. Like VCRs, CED videodisc players had features like rapid forward/reverse and visual search forward/reverse. They also had a pause feature, though it blanked the screen rather than displaying a still image; many players featured a "page mode", during which the current block of four successive frames would be repeatedly displayed. Since CEDs were a disc-based system, they did not require rewinding. Early discs were available only in monophonic sound, but many later discs were issued in stereo sound. (Mono CED discs were packaged in white protective caddies, while the caddies for stereo discs were blue.) Other discs could be switched between two separate mono audio tracks, providing features such as bilingual audio capability. Like the LaserDisc and DVD, some CEDs feature random access, allowing users to quickly move to certain parts of the movie. Each side of a CED disc could be split into up to 63 "chapters", or bands. Two late RCA players (the SJT400 and SKT400) could access these bands in any given order.