SMECN04 How to enable the power off storage function
How to get this product: https://www.aliexpress.com/item/10050...
Q3 Need to save parameters even after power off?
Please press and hold the encoder until the LCD displays ''Data Save ON''
Q6 How to restore factory settings:
1 Normally, power on again to restore default settings.
2 If the power-off save function is enabled, please press and hold the encoder until the OLED displays ''Data Save OFF'', then power on again to restore factory settings.