Adjusted Laser Diode Red Industrial 650nm 5mw Laser Module Dot Focusable 13mmx42mm with 5V 1A US-plug AC Adapter Output Power: 5mw , Wavelength: 650nm Working Voltage: 5V , Laser Shape: Dot Working Temperature 15 ~35 Dimensions: 13x 42mm The package comes with one 5V 1A AC Adapter , the AC adapter is 110-240v wide range voltage input, 5V 1A output. It thus can be used worldwide.