It's arrived immediately after open dispute. Almost three months. Coming later than promised delivery. I don't need it anymore, but I'm get it now. Right into the trash can.
I received this with 4 wire (instead with 3) red black and two white. It is better for connecting, because two whites are for heater and black and red are for supply. Long pres for ON, then every pres for one stage, 100% heater is connect to suplly. 70% means that 1s is ON and 0.3s is OFF. 35% means that heater is ON for 0.3s and OFF for 1s. Simply PWM control, but good. Back side is waterproof.