Feature: 1. Durable belt to drive. It offers quiet, smooth and reliable operation. 2. With clutch function, the curtains can be manually controlled when power fails. 3. Adopting the imported dyneema strap and clutch. 4. Opening Direction: One way or central opening. 5. Simple connectivity, programming and operation. 6. The motor can be oriented on either side of windows or spaces. 7. Able to be integrated with home automation system. 8. Built-in dry contact closure interface for direct connection to Automation or Smart Home System. 9. Designed with reliability and safety – 24V DC transformer. Specification: Item No.:BT-BCK Working Voltage: DC 24V, 1A Radio Frequency: 433.92 MHz, ASK Load Capacity: 40 kgs (maximum)/1.2kgs for each carrier Track Length: 540cm(maximum) Range of Remote Control: 30 m Power: AC 100 – 240V, 50-60Hz Direction: Central or one way opening