JRM Infotech

The AK400 Black uses a single‑tower heatsink design with four Ø6 mm direct‑touch copper heat‑pipes. Shiv Shakti Computers+2TweakTown+2

Heatsink dimensions: ~120 × 45 × 152 mm; overall product size ~127 × 97 × 155 mm. Net weight around 661 g. TLG Gaming+1

Included fan: 120 × 120 × 25 mm, fluid dynamic bearing, 4‑pin PWM. Speeds from around 500 → 1850 RPM. Max airflow ~66.47 CFM, static pressure ~2.04 mm H₂O. Noise rating up to ~29 dB(A). TLG Gaming+2TweakTown+2

Compatibility: Supports a wide range of CPU sockets including Intel LGA1700/1200/115x and AMD AM4 (and many reviews mention AM5 support or upgrade kits) depending on region. Computech Store+1

Performance rating: The manufacturer lists it with a TDP/heat‑dissipation capacity around ~220 W in some listings. 

The ZEB‑4CSL is marketed as a 4‑port docking hub / charging station with additional design features (mobile/tablet stand) rather than a simple USB hub. Zebronics+2Groot Marketing+2

It’s meant to combine utility for both connectivity (USB ports) and as a stand / holder for mobile / tablet devices. Zebronics

It includes detachable baffles and has a blue LED lighting effect. Zebronics+1

The USB ports are also designed for “faster charging” as per Zebronics marketing (i.e. they may support higher current than typical data‑only ports). 

The ZEB‑90HB is a 4‑port USB hub from Zebronics, mainly for USB 2.0 connectivity. Zebronics+2Computech Store+2

It is designed to expand a single USB port (on PC / laptop / desktop) into four. Zebronics+2Zop+2

It features a compact form factor and plug-and-play operation (no special drivers needed in most operating systems).