Hayward PLPS4 Pro Logic PLPS4 Automation Control Pool or Spa Combination PL-PS-4 Truly user friendly and cost effective automation Built-in 100A sub panel, standard Digital display of time, day, temperature of pool/spa and ambient air Built-in keypad for complete operation and programming Variable speed pump control Truly user friendly and cost effective automation Digital display of time, day, temperature of pool/spa and ambient air Built-in keypad for complete operation and programming Variable speed pump control