It seems to be a STM32WB55RGV6TR MCU (with integrated Bluetooth/Zigbee) and an LCD screen/buttons and a plastic case. At $200 that does seem expensive - you could get a real SDR that works with GNU radio for that.
It's also a sub-ghz radio, LF rfid, HF rfid, infrared and I-button, together with a GPIO connector that's seen a couple of interesting modules. More importantly, it has a community around it, with a few competing firmwares, so there are always new uses for it appearing.
https://www.digikey.com/en/products/detail/stmicroelectronic...