Review on Digital Programmable PID Temperature Controller with Meter Indicator, Jaybva Universal Thermostat Fahrenheit and Celsius Display SSR and Alarm Output, Includes 25A Solid State Relay and Thermocouple Probe by Neil Biondo

I've been using them in industry and military for 30 years, they work great but I'm used to tuning, auto-tuning and maintaining them. The customer, on the other hand, found it too complicated and wanted to know why he couldn't pair it with his phone. Generation Z head! Take their phone away from them and they will stop breathing! So I have to send it back but if it was for me I would keep it. The reason I gave it 4 stars instead of 5!