Pegatron device on my network
Pegatron is a Taiwanese contract electronics manufacturer spun off from ASUS.
What Pegatron makes
Pegatron assembles computers, motherboards, phones, networking gear, set-top boxes and consumer electronics for other brands.
What the device on your network probably is
Most likely a set-top box, router or computer that Pegatron built for another brand. Less often a smart-home gadget.
How to work out which device it is
Compare the MAC with labels and network screens on your TV boxes, router and computers. Turn devices off one at a time to see which entry drops off.
Should you be worried
Nothing to worry about in itself. Pegatron is the factory, not the brand.
The app finds every device on the Wi-Fi you are on, at home or in a rental, and puts the vendor next to the hostname, the services it advertises and its open ports, which together usually name the product. Where it cannot tell, it says so instead of guessing. Get RECON for iPhone — one-time purchase, no account, nothing leaves the device.