The Sega Nomad is a handheld Sega Genesis, released in October 1995 for US$180 . The idea was really good because of the already huge library of Genesis games that could be played on the console. But it was fairly bulky with a short battery life (6 AA batteries last 3-5 hours) and its high price meant that it wouldn't sell well. Being released so late also meant that people wouldn't buy it because of the new 32-bit consoles of that time.
The Nomad comes with a frontlit/backlit color screen, AV output jacks so it can be connected to a television via AV cables, a jack for an AC adaptor, and a controller port for a second controller. No games were made specifically for the Nomad, all were just Genesis games.
A great buy at today's prices on Ebay, etc.
Sega Nomad Technical Specifications
CPU: 16-bit Motorola 68000 running at 7.61 MHz
Co-processor: Zilog Z80 running at 4 MHz, controls PSG (Programmable Sound Generator) & FM Chips
RAM: 64 Kbytes
ROM: 1 Mbytes (8-Mbit)
VRAM: 64 Kbytes (Video Ram)
Graphics: VDP (Video Display Processor) dedicated video display processor for playfield and sprite control, 3 Planes, 2 scrolling playfields, 1 sprite plane
Colours Available: 512
Max. Colours on screen: 64
CRAM: 64 x 9-kbit (Colour RAM)
Pixel Resolution: 320 x 224, 40 x 28 text display mode
Sound: Texas Instruments PSG (Programmable Sound Generator) TI 76489 chip, Yamaha YM 2612 FM chip