B4 33D Solar controller, 3 probes, PWM (TDST24M) Supply: 230 V - 50 HzProtection class: IP 40Supplied probes: 3 NTC 10K @ 25 °C ± 1%Working temperature range of probes: -50–200 °C (blue), -50–110 °C (yellow)Preset programs: 6 Go to the product