Hi Felix, As you probably realize, two things will improve your BR:
1. Better quality of traffic to your site - Random guess that this is a mix of electricians, electronic technicians, home and appliance repair pros, and DIYer consumers? If you get more of the people who need your multimeter/oscilloscope/logger, they're less likely to bounce. But how do you multiply your traffic from them? For that, we'd deep dive on your marketing mix to see what channels you're using and adjust contextuality and targeting while implementing new campaigns for bigger reach to ensure that you are getting a much higher volume of true ICP (ideal customer profile) visitors to your website. We'd also develop a winning SEO and content marketing roadmap that you can execute on without hiring support team.
2. The second factor for Bounce Rate is the website conversion experience. Right now you, have a site that is on its way to credibility, but there are some simple fixes that need to be made ASAP to your featured reviews and to the priority you're giving to your products. It's a lot to take in, and some simple fixes will improve your flow. Obviously, removing "Pre-Order" (as soon as that's possible) will help a lot. Messaging-wise, the site needs some help. You're all about features, and missing the benefit. Marketers toss around the acronym FAB: Features, Advantages, Benefits. Right now your site is getting an "F", a lower-case "a", and B is nowhere to be seen.

I do real-time conversion reviews and roadmap strategy if you want a hand. Either way, I hope this helps!