This 24V AC power adapter is professionally engineered for use with Dymo LabelWriter series printers, including the 330, 400, 400 Turbo, 450, 450 Turbo, and older models like the 310 and 320. 🔌 【Wide Compatibility & Safe Use】This 24V AC power adapter is specially designed for Dymo LabelWriter printers, including models 330, 400, 400 Turbo, 450, 450 Turbo, and older versions like 310 and 320.