Just hang the Curtain Driver onto the rail, and start enjoying automated control of your existing curtains based on weather, time, or other Aqara devices triggered. Up to 1-Year Battery Life. Zigbee 3.0. The Curtain Driver E1 supports practically any type of curtain rails or rods. Rod Version supports all the types, while a more cost-efficient Track Version only supports U- and I-Rails .Built-in Light Sensor. Maximum Load of 12 kg. The installation is very fast and does not require any additional tools: the Curtain Driver can simply be mounted onto the existing curtain rails. USB-C for Charging or Power Supply. Compatible with the most popular ecosystems and can be controlled by voice. HomeKit, Alexa, Google, IFTTT, Alice, Marusya are supported when connected to Aqara Hub.