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Hi @Ioannis_Moumtsakis!
1. No time limit. Take as much time as you need.
2. You get a choice of two approved calculators. See this guide to choosing what’s best for you: https://300hours.com/cfa-calculator-guide/
You can bring pencils in but no extra paper. Official list and recommendations: https://300hours.com/cfa-exam-day-checklist-items#.V9xmfKnTXqA