ZIEIS Multi-Purpose Digital Kitchen and Food Scale, Z136-Surge, Black High-contrast backlight and adjustable LCD display allows for FAST & EASY reading in any light Programmable Power: (Auto Off/Always On) - Customize to meet your weighing needs ISO 9001:2000 manufacturer's certification ensures exceptional quality and extreme reliability Power: 110V adapter and Surge Protector (included) or 6 x AA batteries (not included) This ZIEIS digital scale features a ten (10) year manufacturer warranty