Size 1 represents American Standard，Size 2 represents European standard.Details: Power Input: 110V Power:9W Material:PP<br />Color:white， pink Weight:580g Voltage: 220V-240V/50Hz <br />Product Size: app 26.8X9.3X11cm Pack Size: app 27X 9.8X11.3cm<br />Package Included: 1 x Brand New UV Nail Curing Lamp 1 x 9 Watt UV Lamp Tube Usage:1.Plug in the power 2. Put hands or feet inside it， and then press the square button on the rear of this machine， it will start to work finally.