Product description Ture Pure sine wave inverter Rugged Industrial Design As stable as grid-power Maximum Efficiency Fit for various batteries First Class copper wire Silent&Fast Cooling Fan LCD Display All Round Protection Tips and Precaution 1. This is applied for DC 12V, not for 24V. Only connect it to 12V battery. 2. Do not connect the battery cable wrongly, connect red one with positive terminal and black one with negative terminal. 3. Do not turn on it when it's connected with battery in charging. 4. Do not power electric appliances exceed 3500 watts.
5. keep it in cool and dry environment.