1. The board belongs to high frequency square AC output; it is not suitable for the inductive appliance, such as motor, fan and coil transformer.2. While picked up with low-load machines (LED light, mobile phone charger and DVD set-top box), you are suggested to pick up with low voltage point, such as: 172V/110V.3. You should install a large heat sink to release its long time high-load (About 100W) work.4. You could not connect the power inversely. Besides, power supply and power wire should have large enough current.5. Do not overload and short-circuit because it without any protections.6. The number in measured by the output high frequency non-load voltage meter will be a little higher. Output wiring the following voltages: V0--V2=110V V0--V3=175V V0--V4=200V V0--V5=220V V5--V4=20V V5--V3=45V V5--V2=110V V4--V3=28V V4--V2=90V V3--V2=62V Power: 150WInput voltage: DC12VOutput voltage: AC 0-110V-172V-200V-220VQuiescent current: about 0.05AOutput waveform: high frequency square waveOutput frequency: about 20KHZcolour:blueMaterial:PCBsize:50x50x40mmPackage Contents:1x Inverter boost moduleOnly the above package content, other products are not included.Note: Light shooting 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.