1. Remotely control on/off via mobile phone anytime, anywhere 2. View current, voltage, leakage current, total kWh on mobile phone 3. Overvoltage/undervoltage/overcurrent/leakage current can be set in the app, and these parameters can also be set on the protector 4. This device has a memory function. When the power is off, the device can memorize kWh, overvoltage, voltage and overcurrent. 5. Rated power supply voltage: 230V; frequency: 50/60HZ 6. Power display range: 0-99999.9kWh 7. Undervoltage protection: 145V-210V (adjustable) (default: 175V) 8. Overvoltage protection 240V- 300V (adjustable) (default: 275V) 9. Overcurrent protection 1A-63A (adjustable) (default: 63A) 10. Overtemperature protection: 10~85 degrees Celsius (this parameter is only set on the App) 11. Leakage protection: 10-99mA (adjustable) (default: 50mA) This function can be turned off 12. Reconnection time (delayed opening time): 10s-99s (default: 30s) 13. Model difference: SVP-688W-L has backlight display, SVP-688W does not have backlight display