It is too small for levers, but I think Marini offers their travel harp also in a double strung version and that comes with levers, if you want. The size is similar, but the form is different, and I cannot say anything about the sound.
@@StefanieBieber Thank you for the information! but I only can see a single version in the home page. I think since it's double strung so it might be okay without the levers though, well levers could be more comfortable but the price will get much higher.. and the weight as well..