Telink TLSR9218AER Bluetooth, Zigbee Multi-protocol Connectivity SoC, 1MB Flash, temp -40? to 85?, 48 Pin Bluetooth LE 5.2, Bluetooth Mesh, AoA/AoD, 6LoWPAN/Thread, 802.15.4, Zigbee, HomeKit, Find My, Matter, 2.4G Proprietary, RTOS PSA Level 1 Certified