Features 【HIGH QUALITY】This dual power automatic transfer switch made of high‑quality flame‑retardant plastic material, good insulation, high temperature resistance, anti‑aging, safe and reliable 【EASY TO USE】The automatic changeover switch built‑in regular standby opening signal output port, which can be connected with signal indicator light, which is convenient for observation outside the cabinet 【PRACTICAL FUNCTION】The use of silver contacts can greatly improve the conductivity and service life of the product. When the normal power supply is abnormal, the backup power supply will work immediately to ensure the continuity, reliability and safety of the power supply 【APPLICABLE OCCASIONS】This automatic transfer switch is suitable for switching to the backup power supply when the power is cut off, and switching to the main power supply when the power comes in 【SERVICE 】: If you encounter any problems during use, please let us know. We will contact you quickly. It is our pleasure to help you. Specification: Item Type: Dual Power Automatic Transfer Switch Model: ZGQ5-100/4P Material: Plastic Purpose: Switch to the backup power supply when the power fails, and switch to the main power supply when the power comes in Working Frequency: 50-60HZ Rated Current: 100A Rated Voltage: AC110-230V Working Voltage: AC220V Operation Mode: Automatic and manual ATS: CB level Conversion Time: ≤0.05 (S) Number of Poles: 4P Package List: 1 x Dual Power Automatic Transfer Switch 1 x User Manual  Package List 1 x Dual Power Automatic Transfer Switch 1 x User Manual