Product Description:- Low-frequency UPS & Inverter 3000W Specifications: Rated Capacity(W): 3000 Input Commercial Power Range(VAC): 90-270 or 130-270( 20%, -25%) Input Frequency (Hz): 50/60 /-10% Output  Waveform: Pure Sine Wave Output Frequency(Hz): the Shared frequency with the commercial inversion state: 50/60 /-0.5. AVR Voltage range(VAC): 100/110/120/127/220/230/260 /-10% (Auto-Sensing) Output Transfer time: Typical 5ms. Appearance: Weight: 22KG NB: THIS UNIT USES EXTERNAL BATTERIES ONLY, IT DOES NOT COME WITH BATTERIES INSIDE. Protection: Overload: UPS automatically shuts down if overload exceeds 120% of the normal value for 10s. UPS automatically shuts down if overload exceeds 150% of the normal value for 1s. Short Circuit: Equipment output is shut down immediately and long beep alarming. Battery: Type: Sealed, maintenance-free lead-acid. Protection: Automatic self-testing, discharge protection, over-charging protection, smart management system. Recharge Current:10- 15A DC voltage: 24VDC Features: Pure sine wave output, used for different domestic appliances, such as TV, Fan, Cooker Advanced performance and CPU control technology. Wide range of power input and accurate output. Perfect protection for overload, short circuit, over-voltage, low voltage and overheating High efficiency of DC-AC transfer to 80%. Concise LCD display. Intelligent battery management with protection against over-charged and over-discharged Satisfy the power supply for different backup time. When powered off, City electricity to switch on automatically.