The Aqara E1 Smart Roller Shade Driver RSD-M01 is a retrofit roller shade controller that does not require a complicated installation and can work with your existing roller shade by operating the beaded cord. 
Key Features:

4 Adapters for Different Types of Beaded Cords: The majority of roller shades with beaded cords are supported due to a variety of included adapters.
All-Round Compatibility: Compatible with most popular ecosystems and can be controlled by voice. HomeKit, Alexa, Google, IFTTT, Alice, and Marusya are supported.
User-Defined Opening/Closing: The user will be able to pre-set a number of desired open/close percentages and switch between them easily.
2 Month Battery Life*: Thanks to Aqara's battery-saving technologies, you don't need to worry about charging the device every few weeks.