1. PlayStation Portable (PSP):
   • Release Date: December 12, 2004 (Japan)
   • Description: The PSP marked Sony’s entry into the handheld gaming market. It featured a sleek design with a large, vibrant screen and was powered by a custom MIPS CPU. The PSP utilized Universal Media Discs (UMDs) for game distribution, allowing players to purchase physical copies of games or download digital versions. It also supported multimedia functions such as video playback, music playback, and photo viewing. The PSP had a robust library of games, ranging from popular franchises to indie titles, making it a versatile handheld gaming device.
2. PlayStation Vita:
   • Release Date: December 17, 2011 (Japan)
   • Description: The PlayStation Vita was Sony’s successor to the PSP, offering improved hardware capabilities and a focus on delivering console-quality gaming experiences on the go. It featured a high-resolution OLED or LCD touchscreen display, dual analog sticks, front and rear cameras, and touch-sensitive rear pads for additional control options. The Vita supported physical game cartridges as well as digital downloads through the PlayStation Store. It boasted impressive graphics and performance, allowing for immersive gaming experiences on a portable device. Additionally, the Vita featured connectivity options such as Wi-Fi and 3G (in certain models), enabling online multiplayer and social features.

These are the two handheld consoles released by Sony under the PlayStation brand. While there hasn’t been a direct successor to the PlayStation Vita, Sony has integrated handheld gaming features into its other platforms, such as remote play on PlayStation 4 and PlayStation 5, allowing players to stream games from their consoles to compatible devices like smartphones and tablets.