Digital Thermometer Hygrometer Embedded Type LED Digital Humidity Meter with Probe Indoor Use(<span class="ui Risk_flag4"><span class="ui Risk_flag4"><span class="ui Risk_flag4"><span class="ui Risk_f Item Type: Humidity meter Color: White Model: FY-12 Display: LCD Size: Approx. 48 x 28.6 x 15.2mm / 1.9 x 1.1 x 0.6in (the measurement has a small error) LCD Size: Approx. 35.7 x 16.8mm / 1.4 x 0.7in (small error in measurement) Humidity Display: Support Humidity Measurement Range: 10%～99% Humidity Display Resolution: 1% Humidity Sampling Period: 10 seconds (1 minute) Humidity Measurement Accuracy: ±5% Rated Voltage: DC1.5v (2 LR44 button batteries) Temperature Measurement Range: -50 to 70℃ Temperature Measurement Accuracy: ±1℃ (under normal temperature) Line Length: Approx. 1.5 meters / 4.9ft Battery Installation: 1. Flip to the back of this product, 2. Push the battery cover in the direction indicated by the arrows, 3. Put two LR44 (not included) button batteries into the battery slot.