Portowatch is a series of portable pocket televisions that come with NTSC, PAL, ATSC, ISDB-T or DVB-T tuners created and marketed by Theorysonic. It is the first pocket handheld TV to have market success.
Theorysonic had developed to watch TV outside the house with handheld TV.
- Battery-powered handheld TV
- TV channel scan with FM radio
- Analog and digital TV tuners
- PTW-100 (1987)
- PTW-140 (1988)
- PTW-200 (1990)