Step-up and down transformer is an AC voltage converting device. Using it to convert the multi-kind net voltage into general output under which all the electronic equipment are in safe operation. Features: Step-up and down transformer is an AC voltage converting device. Using it to convert the multi-kind net voltage into general output under which all the electronic equipment are in safe operation. This STEP UP and DOWN Transformer can convert to 110-120V or 220 V-240V output. It has precise input voltage selector which you can selects(110Volts or 220Volts depending on the voltage source available)via selector switch located at the back of the unit. Output voltage is 110-120V and 220 V-240V that can be used at the same time. Suitable for television, water dispenser, computer, rice cooker, mini home theater, electric fan, fax machine, printer. Specifications: Input Voltage: AC 110V or 220V Output Voltage: 110-120V or 220 V-240V Item Weight: 3831g / 8.5lb Package Weight: 3900g / 8.6lb Item Size: 190 * 160 * 130mm / 7.5 * 6.3 * 5.1in Package Size: 280 * 200 * 160mm / 11.0 * 7.9 * 6.3in Operating Instruction: Step Up and Down Transformer unit should be placed in a well ventilated area at all times. Step Up and Down Transformer have an input voltage selector located at the back of the unit wherein the user can selects either 110-120V or 220 V-240Vdepending on the available rated voltage source. For appliances with inductive load, such as refrigerators, mini are condition, industrial fan, etc. It is recommended to use a transformer that has rated power capacity of 3 to 5 times of the load power because the start up current of these appliances are vary high. For capacitive load, just leave enough allowance on the rated power capacity of the unit to avert overloading. Check your appliances for the rated power consumptions to avert overloading the unit. Make sure that appliances are switch OFF before turning on the STEP UP and DOWN Transformer unit. Package List: 1 * Transformer 1 * Manual