1 Power supply: 12v outside transformer 2 Temperature sensor: NTC, one sensor, 2m long, neither positive nor negative 3 Humidity sensor: 1 sensor Humidity display range: 00~99% Accuracy: ±03% 4 Temperature display range:-45~99°C            Accuracy: ±01°C 4 Set temperature range :-45~75°C         Factory default: 05°C 5 Dimension: 181mm (L)* 41mm (W)* 68mm (D)    Mounting hole dimension: 138mm (L)* 32.5mm (W) 6 Working environment temperature:-10~60°C Relative humidity: 20-90% (Non-condensing) 7 Relay contact capacity: Compressor relay: 30A/250VAC Light relay: 5A/250VAC