Bleam scanner is an inverted Bluetooth low energy (BLE) beacon communication protocol. In the inverted communication scheme beacon serves as a scanner, taking this role from a phone that in its turn is responsible for advertising. The main benefit of such a design approach is its ability to function extensively in the background, monitoring RSSI levels. See: https://github.com/Connax-Oy/Bleam-Scanner-2
In theory yes, in practice it's currently ported Nordic Semiconductor hardware nRF52840; nRF52832; nRF51822 and nRF52811 is coming. We'll port it on more hardware with the new protocol versions.