Features Millisecond switching for uninterruptible power supply, ensuring continuous power supply. Flame-retardant housing with guide rail installation for safe and easy setup. Immediate backup power activation during abnormal power supply, guaranteeing continuity, reliability, and safety. Compact structure, reliable transmission, and easy installation and maintenance for long-lasting performance. Constructed with excellent ABS material for impact and scratch resistance, ensuring environmental protection. Stable structure, excellent performance, and long service life for reliable automatic power transfer. Features: 1、Millisecond switching, uninterruptible power supply. Adopt flame？retardant housing with guide rail installation 2、The backup power supply will work immediately when the normal power supply is abnormal, to ensure the continuity, reliability and safety of the power supply 3、This switch possess compact structure, reliable transmission, convenient installation and maintenance, and long service life 4、Made of excellent ABS material, possess impact resistance, scratch resistance, environmental protection 5、Automatic transfer switch possess stable structure, excellent performance and long service life Specification: Item Type: Automatic Transfer Switch Shell Material: ABS Rated Working Voltage: 400V AC Rated Frequency: 50Hz/60Hz Electrical Level: PC level Installation Method: DIN rail Package List: 1 x Switch 1 x User Manual Package List 1 x Switch 1 x User Manual