What is the maximum clock speed for the processor in this NAS & Storage device?

The maximum clock speed for the processor in this NAS device is 2.9 GHz.

What are the connectivity options for this device?

The connectivity options for this device include 2 x 2.5GbE LAN, 4K HDMI v1.4b, 2 x USB 3.2 Gen2 Type-A, and 2 x USB 2.0 ports.

This device can accommodate 4 storage drives, as it has 4 x 3.5/2.5 SATA 6Gb/s drive bays.

Yes, the device comes with a 250W power supply unit.

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QNAP 1U 4-Bay Rackmount NAS (Intel Celeron N5105/N5095 4-Core/4-Thread Processor, 8GB)

Intel Celeron N5105/N5095 4-core/4-thread, burst up to 2.9 GHz, 8GB RAM (on-board, non-expandable), 4 x 3.5/2.5 SATA 6Gb/s drive bays, 1 x PCIe Gen3x2 slot, 2 x 2.5GbE LAN, Intel UHD Graphics, 4K HDMI v1.4b, 2 x USB 3.2 Gen2 Type-A, 2 x USB 2.0, 1 x 250W PSU
Storage Device Type: Network Attached Storage
Processor / Type: Celeron
Processor / Clock Speed: 2 GHz
Processor / Number: N5105
Multi-Core Technology: Quad-Core
RAM / Total Installed Size: 8 GB
Total Storage Capacity: 4 x 3.5/2.5 SATA 6Gb/s drive bays, 1 x PCIe Gen3x2 slot
Data Link Protocol: Gigabit Ethernet
Processor
Cache Memory Installed Size: 4 MB
Storage
Hard Drive / Size: 3.5"; 2.5"
Hard Drive / Interface Type: SATA 6 Gb/s
Storage Controller
Storage Controller Type: PCI Express
Expansion
Interfaces & Connections: 2 x 2.5GbE LAN, 4K HDMI v1.4b, 2 x USB 3.2 Gen2 Type-A, 2 x USB 2.0,
USB 2.0 Qty: 2
Power
Power / Installed Qty: 1
Power / Provided (W): 250 Watt