SINOTIMER MH0348 Intelligent High Precision Temperature Humidity Controller Digital Display Temperature And Humidity Meter1. Operating power: AC220V, 50HZ 2. Power consumption: less than 2W 3. Resolution: 0. 1 4. Temperature range: 40. 0 80 degrees Celsius 5. Humidity range: 0 99. 9% 6. Basic error: temperature: less than 0. 5% FS; humidity: less than 4. 5% FS 7. Display device: LED 8. Control output: AC250V 3A (resistive load) 9. Operating environment: 10 50 degrees Celsius, 45 85% RH 10. External size: about 4. 8 x 4. 8 x 8. 5cm 11. Hole size: approx. 4. 5 x 4. 5cm