5V single power supply Pin Set 4 pure sine wave output frequency: 50Hz pure sine wave 60Hz fixed frequency pure sine wave 0-100Hz fixed frequency pure sine wave frequency adjustable sine wave frequency adjustable 0-400Hz unipolar and bipolar modulation with a dead zone, 4 pin set dead time: 300nS dead time 500nS dead time 1.0uS dead time 1.5uS dead time external 12MHz crystal oscillator The frequency of 23.4KHz * PWM temperature, voltage and current feedback real-time processing overvoltage and undervoltage, overcurrent, overheating protection function the response time of soft pin setting mode 1S the serial communication of output voltage and frequency parameters external serial port 128*32 liquid crystal display module shows the inverter voltage, frequency, temperature and current information, etc. LCD type: 1 LCD; 2 common 128*32 LCD (liquid crystal, an additional purchase). The driver board: Undervoltage protection + A:128*32 LCD Undervoltage protection + B: LCD No undervoltage protection + C:128*32 LCD No undervoltage protection + D: LCD EG8010 pure sine wave inverter chip application areas single phase pure sine wave inverter photovoltaic inverter wind power inverter uninterrupted power supply UPS system digital generator system if power supply single phase motor speed regulation controller single phase inverter sine wave light regulator sine wave voltage regulator sine wave generator Colour:blue Material:plastic Package Contents: 2 x Pure Sine Wave Driver Board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.