1,Pre-flashed with EZSP v8 (EmberZNet Serial Protocol version 8) 2,Can use ZHA in Home Assistant or Zigbee2MQTT (pre-alpha) 3,Base on EFR32MG21 CH340E 4, 20dBm output gain,PCB antenna 5,Plastic Shell Support OTA Via Uart ( the BOOT button,then and release the nRST button, finally release the BOOT button) Baud rate: 115200 If the device is following Zigbee standards it is possible it work with other gateway solutions, it is just not confirmed as working yet! It comes pre-flashed with an unsigned EmberZNet 6.7.9 Zigbee NCP application firmware with Silabs standard EZSP v8 (EmberZNet Serial Protocol version 8) interface enabled as well as the standard Silabs Gecko Bootloader firmware for recovery, meaning it can be used either as-is out-of-the-box or flashed with custom application firmware via USB. Hardware is at its core based onSilicon Labs EFR32MG21 Series 2 Multiprotocol Wireless SoC(part numberEFR32MG21A020F768IM32) and aWCH CH340E USB to Serial/UART Bridge Controller. While it only has a PCB circuit board antenna the radio has an integrated 20 dBm Power Amplifier (output power) and -104.5 dBm Receive Sensitivity which should be made for a very good Zigbee coordinator or Zigbee router if both hardware and firmware were properly implemented. Colour:Photo Color Material:plastic Package Contents: 3 x USB Dongle Chip Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.