Worldwide input voltage of 100-240VAC 50/60Hz. Provides protection against over voltage, over current, and short circuit. Units have been tested and are in great working condition. UpBright offers a 30-day money back guarantee and a 1-year service warranty. This is a new global 9V AC/DC adapter replacement for HealthOMeter ADPT31-AC adapter. It is compatible with Health O Meter 498KL, 499KL, and 500KL digital scales. It has a DC9V 200mA output and comes with a power supply cord, cable charger, and mains PSU.