Based on this product's specifications, here are some alternatives and similar models
Adjustable Power Supply Voltcraft USPS-1000N — output selectable 3V, 4.5V, 5V, 6V
Summary description:
Voltcraft USPS-1000N is an adjustable laboratory-style power supply with selectable output voltages of 3V, 4.5V, 5V and 6V. Designed for bench testing, electronics repair and powering small devices, it provides precise voltage selection and stable DC output. Easy to set up and suitable for hobbyists, technicians and small workshops requiring reliable low-voltage supply.