Portowatch

Portowatch is a series of portable DVD/Blu-ray player and pocket television combined devices 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.

History
Theorysonic had developed to watch TV outside the house with handheld TV. The first Portowatch digital TV model was released in 2002, and HD model was released in 2006. Portowatch digital TV dongle was first released in 2005.

Features

 * PTSUG-based software (since 2010 models)
 * Battery-powered handheld TV
 * TV channel scan with FM and AM radio
 * Analog and digital TV tuners
 * TheoryMedia player app (since 2002 models)
 * Live TV Channels and applications (since 2007 models)

Models

 * PTW-100 (1987)
 * PTW-140 (1988)
 * PTW-200 (1990)
 * PTW-215 (1991)
 * PTW-230 (1993)
 * PTW-250 (1996)
 * PTW-290 (1997)
 * PTW-310 (1999)
 * PTW-360 (2002) - First digital television model
 * PTW-410 (2005)
 * PTW-430 (2006)
 * PTW-450 (2007)
 * PTW-490 (2009)
 * PTW-500 (2010)
 * PTW-520 (2013)
 * PTW-550 (2015)
 * PTW-570 (2017, 6.0", 8.0", and 10.1", 128, 256 and 512 GB models for apps and media)
 * PTW-600 (2018, 6.0", 8.0", and 10.1", 128, 256, 512 GB, and 1 TB models for apps and media)