Description:Functional overview:1. LCD display2. The hole size is 41mm in diameter (the measurement has a little error)3. Total diameter 45.2mm (measurement has small error)4. Humidity display5. Moisture meter range 10% - 99%6. Humidity display: 1% resolution7. The moisture sampling cycle is 10 seconds (1 minute)8. Moisture meter, you can mention them 5%9. Rated voltage dc1.5v (1 x AG13 button battery)10. Temperature measurement range-50 to 7011. Temperature measurement accuracy 1 degree (at normal temperature)Battery Installation:Flip backwards of this product; Press open the battery cover in the direction indicated by the Pi arrow; Insert two LR44 button batteries into the battery slotSpecifications:Net Weight: 16.8g Size: 4.5*4.5*1.5(cm)Color: White, Black, Blue, Yellow, Red, GreenMaterial: Acrylic LCD Package Includes:1*Thermometer(With 1 Battery)