Wi-Fi Repeater Function: The Hub E1 not only expands your Zigbee network but also acts as a Wi-Fi 2.4 GHz repeater and makes the coverage of other Aqara hubs and other Wi-Fi devices more stable. Please note: Only 2 devices are supported. Powered by USB-A: A regular USB-A port is integrated into the Hub's housing so that it can be powered from almost any USB-equipped device such as a power bank, power strip, outlet, PC, or even a router. All-Round Compatibility: Makes Aqara child devices connected to it compatible with most popular ecosystems and voice assistants such as HomeKit, Alexa, Google, and IFTTT. (*The Hub E1 is not an end device, and it cannot be controlled by third-party ecosystems. In contrast, it exposes the supported Aqara child devices to such ecosystems and/or makes them controllable by voice.) Note: Not all Aqara child devices are compatible with all platforms. Please see details for each device. Flexible and Small Size: The Hub E1 shaft angle can be changed within 210 degrees, which makes its placing extremely flexible. The Smart Hub E1 is compact and very easy to carry, size: 4.25” x 1.18” x 0.3”, weight: 58 grams. Occupies less space and can be placed almost anywhere. Note: Aqara Hub E1 can connect up to 128 Aqara devices (*use of repeaters such as the Aqara Smart Plug or Aqara Smart Wall Switch(With Neutral) is required). Zigbee 3.0 Support, enjoy the benefits of the fastest, most stable, and energy-efficient smart home technology.