Adesso ADP-PU21 - PS/2 to USB Adapter, connects 2 PS/2 connectors to 1 USB port/hub,Black
As an Amazon Associate, SpecPicks earns from qualifying purchases.
*Price sourced from Amazon.com. Last updated 2026-04-19. Price and availability subject to change.
Bottom line: The Adesso ADP-PU21 - PS/2 to USB Adapter, connects 2 PS/2 connectors to 1 USB port/hub,Black is a niche pick — read recent reviews before buying in the keyboards & mice category, priced around $12.18. Compare close alternatives before committing.
The Adesso ADP-PU21 USB to PS/2 adapter is the best solution for those who want to use legacy PS/2 devices on new USB systems. It allows you to connect a PS/2 mouse and keyboard through the USB port on any computer. Perfect for Notebook Laptop users.
SpecPicks Verdict
SpecPicks scored Adesso ADP-PU21 - PS/2 to USB Adapter, connects 2 PS/2 connectors to… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the keyboards & mice category. Adesso's keyboards & mice lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Mixed or limited buyer feedback at this price point — focus your evaluation on recent reviews that specifically address build quality and long-term reliability, and shortlist one or two close alternatives before deciding.
Common buyer scenarios for keyboards & mice of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Easy installation, no software driver needed
- ✓ Backed by Adesso's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- Easy installation, no software driver needed
- Use Existing PS/2 Input Devices on New USB Computers
- Connect Two PS/2 Input Devices to One USB (PC) Port
- Works With All Adesso Touchpad and Trackball Keyboards
- Compliant with USB 1.0/1.1 Revisions
- Supports both UHCI and OHCI specifications
Full Specifications
| Brand | Adesso |
|---|---|
| Color | Black |
| Finish | Black |
| Unit Count | 1 Count |
| Connectivity | USB |
| Model Number | ADP-PU21 |
| Compatibility | PC, Switch |
| Built-In Media | Computer Peripherals^Cables and Cable Adapters^USB Cables^ |
| Connector Type | PS |
| Item Dimensions | 2 x 1.5 x 0.5 inches |
| Mfr Part Number | ADP-PU21 |
| Number of Items | 1 |
| Number of Ports | 1 |
| Power Plug Type | No Plug |
| Compatible Devices | PC |
| Warranty Description | 1 year |
| Item dimensions L x W x H | 2 x 1.5 x 0.5 inches |
| Specific Uses For Product | personal |
| Global Trade Identification Number | 00783750000246, 00783750001601, 07837500016018 |
Ready to buy?
Adesso ADP-PU21 - PS/2 to USB Adapter, connects 2 PS/2 connectors to 1 USB port/hub,Black is sold on the used and vintage market, where eBay carries the live inventory — Amazon does not stock this part. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-04-19. Price and availability subject to change.
Related Keyboards & Mice
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- Best Retro Handhelds in 2026 — From $35 to $500
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Best 1440p Gaming GPUs in 2026
- How to Build a Windows 98 Retro PC in 2026
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
More reviews from the SpecPicks archive
Browse all reviews →- Best Streaming Starter Kits in 2026: Mic, Light, Capture, and the One-Box Builds
- Best CPU Coolers for Ryzen 9000 (9800X3D / 9950X3D) in 2026
- GPT-5.6 Rollout Now Requires US Government Sign-Off, Customer by Customer
- Best GPU for Ryzen 5 5500 in 2026 (Budget to 1440p)
- Jan.ai vs LM Studio vs Ollama: Easiest Local-LLM App for a 12GB Card in 2026
- Best SSD for Gaming and Everyday Builds in 2026
- Building multi-agent AI orchestrators — LangGraph, DSPy, n8n, and picking the right one
- Imaging Vintage IDE Drives in 2026: A CompactFlash + USB Adapter Workflow
- Ryzen AI Max 395 Laptop: Specs and AI Performance
- Build a DualSense PC Dongle with a Raspberry Pi Pico: Adaptive Triggers and Haptics on Windows
- Building a Budget Sim Racing Setup: Logitech G920 vs Thrustmaster TH8A Shifter
- How to run Qwen 3 32B on Apple M3 Ultra
- Local LLM PC Build 2026: What 12GB of VRAM Really Runs
- Best 1TB SATA SSD for Cloning Old Drives and OS Migrations 2026
- Best Cooler for a Ryzen 7 5800X: ML240L RGB V2 vs Kraken M22
- G4-Meromero 31B: Running the Uncensored Gemma 4 Finetune on a 12GB RTX 3060
- AI Rigging 3D Models: The 2026 Hardware Guide
- Amstrad CPC Emulator Now Runs on the Raspberry Pi Pico 2
- Does Dual-Channel RAM Matter for Local LLM Inference?
- 360mm vs 240mm AIO: Is the Bigger Radiator Worth It in 2026?
- Unified RAM for LLMs: 2025-2026 Hardware Guide
- Windows XP Gaming in 2025: Hardware, Fixes, Best Games
- AOC U27G4XM 4K 160Hz Review: Speed, Flexibility, Value
- Intel Arc B580 & Arc Pro B60 24GB vs RTX 3060 12GB for Local LLMs
Earliest SpecPicks reviews
Browse full archive →- Best GPU for Llama 3.1 8B (2026)
- Best GPU for Qwen 3 14B (2026)
- Best GPU for Qwen 3 32B (2026)
- Best GPU for Llama 3.1 70B (2026)
- Best GPU for DeepSeek-R1 32B (2026)
- Best GPU for Llama 3.1 405B (2026)
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 14B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 70B on NVIDIA GeForce RTX 5090
- How to run DeepSeek-R1 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 4090