Undervoltage warning Low voltage protection Short circuit protection High temperature protection High voltage protection.Overload protection Type:Pure Sine Inverter Model:4000W Output Waveform:Pure Sine Wave Socket Type:Universal Input Voltage:DC24V Output Frequency:50Hz Rated Power:2000W Notice: 1. 24V's inverter only can connect 24V's battery (Input voltage range about 20V to 30V) 2. Don't connect the inverter to the household circuit 3. Small common sense of electrical power. Inverter conversion efficiency about 90%. Rated power * Conversion efficiency = Actual power 4. How to choose a suitable battery for inverter Working time = U (voltage payment) x I (battery capacity) x 0.8 x 0.9 electrical power Example: a 12V 50AH battery with a 220V 100W bulb Working time=12Vx50AHx0.8x0.9100W=4.32(hours) Note:0.8 is the battery discharge coefficient (constant) 0.9 is the conversion efficiency of the inverter (constant) The product appearance and printed words may vary depending on the batch, but this does not affect use. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC100-240V Colour:As Shown Material:aluminum alloy Package Contents: 1 * Voltage Inverter 1 * adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.