are electric mosquito killers actually worth buying?

We just moved into a new house and there are a lot of sparse woods near the back. The mosquitoes are terrible, worse than i have ever experienced in my life. They start swarming us after less than five minutes outside, and i cannot find any obvious standing water nearby.

I have been looking at electric mosquito killers and noticed there are many options on marketplaces like amazon and alibaba. Before i spend money on one, i would love to hear real product reviews from people who have actually used them. Did an electric mosquito killer make a noticeable difference, or was it not worth the purchase? I am especially interested in models that worked well outdoors.