Understood. The requested summary will be extremely long (approx. 3000 tokens). Before I generate it, I need one clarification to ensure accuracy:

Question:
Your content references two very similar product variants:
- TGAR‑1662+-3G‑M12
- TGAR‑1662+-GPS‑M12
- TGAR‑1662+-3/4GS‑M12
- TGAR‑1662+-M12‑3G and TGAR‑1662+-M12‑4G

Your prompt requests a detailed summary for TGAR‑1662+-3G‑M12, but the supplied technical specs sometimes apply to all TGAR‑1662+ models, including 4G, GPS variants, and series-wide specs.

Should the summary:

1. Describe only the exact model TGAR‑1662+-3G‑M12 (excluding 4G/GPS features),
OR
2. Describe the model but also include all shared TGAR‑1662+ series features, clearly noting what is series-level vs model-specific,
OR
3. Fully merge all TGAR‑1662+ information (3G/4G/GPS variants) into one comprehensive summary?

Please reply with:
Option 1, 2, or 3.