This dual-power automatic transfer switch can make the common power supply and emergency power supply switch easily. When one is cut off, the other will start supplying power. Key Features Durable & Sturdy: This dual-power automatic transfer switch has a flame-retardant plastic material shell, a built-in pure copper motor, and a copper indicator wiring terminal, which offer durability and sturdiness for this product. Two Operation Modes: This dual-power automatic transfer switch can be operated automatically or manually to ensure the continuity of power supply, with simple operation and reliable performance. Safe to Use: The built-in fail-safe mechanism makes the switch automatically stop when a short circuit, overload, etc, happens. Also, the square-shaped power terminal can prevent accidental contact. Good Performance: It adopts a CB level, which can automatically switch the power supply in about 1-2 seconds to build an uninterruptible power supply. High Stability: Screw holes are provided at the iron base of this dual-power automatic transfer switch to fasten it firmly, allowing it to work steadily. Low Noise: It uses excellent devices to minimize the noise generated during use, so you do not need to worry that its operation will disturb your normal rest. Closed Design: The closed design effectively prevents dust, water, oil, etc. from entering the switch, while minimizing the need for daily maintenance as much as possible. Details Transfer Switch: One-touch switch makes it easy to choose between manual and automatic switching to suit different usage situations. Manual Knob: In manual mode, you can switch between normal/backup power by turning the large knob to make the operation simple and clear. Small Indicators: The different indicators allow you to have a better grasp of its working status to make timely adjustments. Application It is ideal for homes or public places and is especially suitable for household electricity, fireboxes, motor homes, hospitals, shopping malls, hotels, workshops, bank offices, etc. Specifications Material: Flame-retardant Plastic, Copper, Iron Color: Blue, Grey Style: Modern, Simple Shape: Rectangle Operation Mode: Automatic or Manual Working Voltage: 220V Rated Voltage: 400V Rated Current: 63A Conversion Time: 1-2 Seconds Number of Poles: 4P ATS: CB Level Use Level: AC-33iB Gross Weight: 1.6kg/3.52lbs Net Weight: 1.45kg/3.19lbs Product Size: 22.5*13*12cm/8.85*5.11*4.72inch Package Size: 25.5*18*14.5cm/10.03*7.08*5.7inch Package Included 1*Dual-power Automatic Transfer Switch 1*English Manual