Dual power supply interlocking air switch, is powered on, the other trips off immediately. Specification: - Quantity: 1pcs - Color as shown - Rated current: 125 amps - Working voltage: 240 -400volts - Contact type: normally closed, normally open - material: metal - Installation Type: Wall Mount - Dimensions: 253mm high x 126mm wide x 110mm deep Package Included: 1 Mains to generator transfer switch Notes: 1. Due to various factors such as display brightness and light brightness, the actual color of the product may be slightly different from the website picture. Please allow a slight deviation between the data and the manual measurement. Also, the each additional item means.The the same color and size. Transit time may be a little delayed because of the. If you have any questions.