A few things I thought of off the top of my head: Trust, Credibility, Product Knowledge.
As an SDR, having the trust of your buyer is huge. Convincing them to part with 10-15 minutes requires mutual buy-in from both parties.
Credibility helps a ton as well. If you command authority and display expertise in your space, prospects expect a high-quality experience.
Product knowledge isn't too bad either. Showcasing your mastery of the product and your SME tells the prospect you won't waste their time.
What do you lean on the most to book meetings and get prospects into your sales pipeline?