spa control system: 1.CE.FCC,ROHS EUROPE and USA STANDARD. 2.110V/ ... competive price NameKL8-3HTypeSPA controller: KL8 SeriesDetailsFunctional overview1,6KW features the largest heating thermostat, pre-heating function, temperature display and setting ... ,Water anti-freeze function.11,Backlight function keys.12,Board computer function key lock.13,Three-phase or single phase, optional ...