The SonyGlasstron was a family of portable head-mounted displays, first released in 1996 with the model PLM-50. The products included two LCD screens and two earphones for video and audio respectively. These products are no longer manufactured nor supported by Sony.
The S700 allowed for see through mode using LCD shutters and had support for SVGA output. Its LCD had over 1.55 million pixels on a component the size of a ten-cent coin at SVGA (800×600) display resolution. The S700 has NTSC input, whilst the S700E has PAL input. The S700 was released on 10 November 1998 in Japan.