Fire alarm：TH-3
Wireless Temperature/ Humidity Sensor
| Power | one CR-123 Lithium battery. |
| Reading Update Speed | Once every 30 seconds (maximum). Sends temperature/ humidity reading at 30-minute interval alternatively. |
| RF power | Less than 10mW. |
| Working Temperature Range | -20℃ to 50℃ (over this range the working of the sensor is not guaranteed) |
| Sensor Accuracy | 0℃ to 50℃ +/- 1℃ max.,-40℃ to 85℃ +/- 2℃ max. 20% to 80% +/- 4% max., 0% to 100% +/- 5% max. |
| Estimated Battery Life | 3.5 years @ 25°C (Temperature/Humidity variation 10 times/day) |
| Low Battery Detection | 2.6V+/- 0.1V. |
| Size | 107x25x21 mm w/o bracket, 109x28.5x23 mm with bracket. |
| Weight | about 35 g w/o battery, 46 g with battery |