Product Name: Garage Door Opener with Al Rail Model NO.: GF-GM02 Certification: CCC Starting Mode: Auto-induction Voltage-reduced Starting Casing Protection: Protection Type Function: Driving Number of Stator: Single-Phase Speed: Low Speed Application: Door Opener Input Power: AC 220V, 50Hz Radio Frequency: 433.92MHz Voltage: 210-240V Protection: IP20 Trademark: G-FORCE Transport Package: Carton Origin: China Product Description sectional chain (optional)Function:*Electronic limit switchs*Automatic safety reverse*3 minutes light delay*Manual release in case of power failure*Chain drive,low noise*Soft start,soft stop*Backup battery function(optional)*With CE certificate*Steel track & Aluminum tracK