ZH Currtain Curtain Motor ZM87: Fast Setup, Smart Control. ZM87 Easy Assemble Curtain Wiring Smart Curtain Motor offers a constant power supply design, quickly upgrading your curtains to smart control. The track can be assembled in just 3 minutes, with adjustable lengths from 2.2 to 8.2 meters, fitting various window sizes. ZM87 Easy Assemble Curtain Wiring Smart Curtain Motor Unique Advantages: Control: RF433, Wi-Fi, Zigbee, Bluetooth mesh, Matter; Percentage control; Smart home connection; Curtain position setting; Automatic limit setting; Light touch-start function; Power off manual function; 3 minutes to quickly assemble the track, 2.2-8.2 meters.