Key Specifications: 
Brand: Lenovo
Model: ThinkCentre M900 Mini (Tiny Form Factor)
Processor: Intel Core i5 (6th Generation)
RAM: 8GB DDR4
Storage: 500GB HDD
Graphics: Integrated Intel HD Graphics
Features:
Compact Design:
The M900's "Tiny" form factor makes it ideal for space-constrained environments. 
Performance:
The 6th Gen Core i5 and 8GB RAM offer sufficient power for general productivity and multitasking. 
Connectivity:
It includes multiple USB ports, DisplayPort, VGA for video, and a Gigabit Ethernet port. 
Business Features:
As a ThinkCentre model, it may include security features like a Trusted Platform Module (TPM) and Intel vPro support (on some models). 
Considerations: 
HDD vs. SSD:
A 500GB HDD provides ample storage but is slower than an SSD, which could affect boot times and application loading.
Specific CPU Model:
The exact Core i5 model (e.g., i5-6500T) will affect clock speeds and power consumption.