The Vostok-Europe Energia-2 Automatic Professional dive watch model NH35A/575B281 is a remarkable timepiece, drawing inspiration from the Energia Rocket. This watch is notable for several key features and specifications:

1. Design and Build: The watch has a commanding presence with its 48mm diameter and 17.3mm thickness, making it a substantial piece on the wrist. It is crafted from 316L stainless steel, known for its durability and resistance to corrosion, particularly in marine environments. This steel is coated with rose PVD (Physical Vapor Deposition), giving it a distinctive, modern appearance while enhancing its wear and scratch resistance.

2. Helium Release Valve: A critical feature for professional divers, the helium release valve allows for the safe expulsion of helium that may accumulate inside the watch during prolonged deep-sea diving operations. This feature prevents the potential damage to the watch due to pressure differences.

3. Crown: The screw-down crown helps in maintaining the watch's water resistance, ensuring that water does not enter the case during diving.

4. Crystal: A 3.5mm thick K1 crystal protects the dial. K1 crystal is valued for its unique blend of scratch resistance and shatterproof qualities, making it more durable than standard mineral glass and more shatter-resistant than sapphire crystal.

5. Tritium Illumination: The watch features tritium illumination on its hands and dial. Tritium is a radioactive isotope that emits a steady glow, providing excellent visibility in low-light conditions without the need for external light charging. This makes the watch highly readable in the dark depths of the ocean or during nighttime activities.

6. Water Resistance: With a water resistance of up to 300 meters, the Energia-2 is well-suited for professional diving and withstands significant underwater pressure.

7. Straps and Accessories: The full kit includes a versatile range of accessories. It comes with a brown leather strap and a black silicon strap, catering to different styles and functional needs. The inclusion of a strap-changing tool allows for easy customization.

8. Packaging: The watch is packaged in a professional dry box, which can hold up to four watches. This box is not only a practical storage solution but also adds an element of professional-grade care for the watch.

9. Dial: The dial of the watch is finished in gold, which adds a touch of elegance and luxury, contrasting beautifully with the more utilitarian aspects of the watch's design.

Overall, the Vostok-Europe Energia-2 combines functional diving features with an elegant design, making it a versatile timepiece for both professional divers and watch enthusiasts.