The main CPU of the WonderSwan is a 16-bit NEC V30 MZ.
 The original model's screen is capable of displaying up to eight shades of gray, in contrast to the four displayed by the WonderSwan's main competitor, the Game Boy.
 Similar to the Atari Lynx, the handheld has an extra set of buttons allowing the console to be played at different angles; for the WonderSwan, these buttons were used to allow gamers to play games in both the portrait and landscape orientations.
 The WonderSwan series are all powered by a single AA battery, with the original monochrome version having a battery life of 40 hours.
It also allows players to record their personal information, such as their name, birth date, and blood type, which then can be accessed and used by the game.
Its LCD screen is 2.49 inches (6.3 cm) and displays at a resolution of 224 × 144.
Its sound capabilities consist of four PCM channels, each of which can play 32-sample, 4-bit sounds at selectable volume and pitch levels.

The physical measurements of the WonderSwan Color are 12.8 by 7.43 by 2.43 centimetres (5.04 in × 2.93 in × 0.96 in), slightly larger than the original WonderSwan, and it weighs 96 grams (3.4 oz).
Its CPU is a 3.072 MHz NEC V30 MZ, and it includes 512 kbit of RAM, which is shared between the video RAM and the work RAM.
The screen on the WonderSwan Color can display up to 241 colors out of a palette of 4096, and up to 28 sprites per line.
It offers backward compatibility with all previous WonderSwan titles.
Its LCD screen is also larger than that of the original WonderSwan, measuring 2.9 inches (7.4 cm).
The WonderSwan Color has an approximate battery life of 20 hours.
The SwanCrystal improves upon the design of the WonderSwan Color through the use of a TFT LCD monitor, which has a superior response time to the FSTN monitor used in the former system.
This helped to reduce motion blur in the handheld's graphics.
The unit's case was also redesigned to be more durable.
Its approximate battery life is 15 hours.
 The original WonderSwan's cartridges were solid black in color, while the WonderSwan Color's cartridges were clear.
 Games for the original WonderSwan would not have color on a WonderSwan Color, and would display in its original grayscale.

Several features and accessories were developed for the WonderSwan.
The WonderWitch is an official software development kit aimed at amateur programmers that was released by Qute Corporation.
It sold at a cost of ¥11,800 and allows for games to be developed in the C programming language.
An adapter was created to connect headphones to the handheld, as the WonderSwan lacks a headphone port.
A remote-controlled robot known as the WonderBorg can be operated through the unit.
In addition, the handheld can be connected to a PocketStation, a memory card peripheral for the PlayStation console, through a device known as the WonderWave.
The WonderSwan and its later models were also capable of connecting to the internet via a mobile phone network.
The main CPU of the WonderSwan is a 16-bit NEC V30 MZ.  The original model's screen is capable of displaying up to eight shades of gray, in contrast to the four displayed by the WonderSwan's main competitor, the Game Boy.  Similar to the Atari Lynx, the handheld has an extra set of buttons allowing the console to be played at different angles; for the WonderSwan, these buttons were used to allow gamers to play games in both the portrait and landscape orientations.  The WonderSwan series are all powered by a single AA battery, with the original monochrome version having a battery life of 40 hours. It also allows players to record their personal information, such as their name, birth date, and blood type, which then can be accessed and used by the game. Its LCD screen is 2.49 inches (6.3 cm) and displays at a resolution of 224 × 144. Its sound capabilities consist of four PCM channels, each of which can play 32-sample, 4-bit sounds at selectable volume and pitch levels.
The physical measurements of the WonderSwan Color are 12.8 by 7.43 by 2.43 centimetres (5.04 in × 2.93 in × 0.96 in), slightly larger than the original WonderSwan, and it weighs 96 grams (3.4 oz). Its CPU is a 3.072 MHz NEC V30 MZ, and it includes 512 kbit of RAM, which is shared between the video RAM and the work RAM. The screen on the WonderSwan Color can display up to 241 colors out of a palette of 4096, and up to 28 sprites per line. It offers backward compatibility with all previous WonderSwan titles. Its LCD screen is also larger than that of the original WonderSwan, measuring 2.9 inches (7.4 cm). The WonderSwan Color has an approximate battery life of 20 hours. The SwanCrystal improves upon the design of the WonderSwan Color through the use of a TFT LCD monitor, which has a superior response time to the FSTN monitor used in the former system. This helped to reduce motion blur in the handheld's graphics. The unit's case was also redesigned to be more durable. Its approximate battery life is 15 hours.  The original WonderSwan's cartridges were solid black in color, while the WonderSwan Color's cartridges were clear.  Games for the original WonderSwan would not have color on a WonderSwan Color, and would display in its original grayscale.
Several features and accessories were developed for the WonderSwan. The WonderWitch is an official software development kit aimed at amateur programmers that was released by Qute Corporation. It sold at a cost of ¥11,800 and allows for games to be developed in the C programming language. An adapter was created to connect headphones to the handheld, as the WonderSwan lacks a headphone port. A remote-controlled robot known as the WonderBorg can be operated through the unit. In addition, the handheld can be connected to a PocketStation, a memory card peripheral for the PlayStation console, through a device known as the WonderWave. The WonderSwan and its later models were also capable of connecting to the internet via a mobile phone network.
WonderSwan