400mm 300MM 200MM Tuya Smart Window Chain Opener — Motorized Skylight & Casement Actuator

Motorized chain actuator for skylights and casement windows with Tuya smart capability. The chain is designed to bend in one direction: it extends as the window opens and retracts back into the unit when the window closes. Constructed with a double-layer chain for improved strength and resistance to breakage. Includes an overload protector and is built to perform open/close operations for 20000times. Engineered for reliable, powerful operation — Push/Pull force 400N and locking force reaches 2000N.