13 in 1 Tuya WIFI Intelligent Thermometer Hygrometer Indoor Accurate Temperature Humidity Gauge Monitor with Time/Calendar/Alarm Display Support Remote APP Control for Home Office Color: White Material: ABS Subunit Quantity: 3pcs/5pcs(optional) Display: 2.8 Inch TFT Screen Temperature Detection Ranges: -20-55℃, ±1℃ Humidity Detection Ranges: 0-99%RH, ±3%RH Main Unit Voltage: 3.7V Subunit Voltage: 3.0V Main Unit Battery: Built-in 3.7V, 2000mAh Lithium Battery Subunit Battery: 2 * AAA Battery(Not Included) Working Current: 180mA Main Unit Size: 89 * 83 * 36mm/ 3.5 * 3.3 * 1.4in Main Unit Weight: 135g/ 4.8oz Subunit Size: 59 * 59 * 19mm/ 2.3 * 2.3 * 0.7in Subunit Weight: 40g/ 1.4oz Package Size: 195 * 160 * 72mm/ 7.7 * 6.3 * 2.8in Package Weight: 3pcs Subunits: 380g/ 13.4oz                               5pcs Subunits: 460g/ 16.2oz