The Sonoff ZBDongle-E is a Zigbee 3.0 USB dongle designed to act as a coordinator for your smart home network. Built around the EFR32MG21 chipset, it allows you to integrate and manage up to 32 devices simultaneously across various operating systems including Windows, macOS, Linux, Ubuntu, and Raspbian. This makes it a versatile choice for users running automation platforms like Home Assistant, openHAB, or Zigbee2MQTT. To ensure a stable connection throughout your home, the device features an external SMA antenna that is both detachable and adjustable, paired with an output gain of +20dBm. The internal components are housed in a durable aluminum alloy casing measuring 75 x 25.5 x 13.5 mm, which helps with heat dissipation during operation. It arrives pre-flashed with EZNet 6.10.3 firmware and operates on a standard 5V DC input, making it easy to plug directly into a USB port for immediate setup.