- Easy reading; - Good accuracy; - Good performance; - Reliable and durable; thermometer, ring's size: 60mm, 90mm, 108mm, 130mm, 152mm, 165mm, & 180mm,Thermometer, Hygrometer, Barometer and clock available - Measurement range:. Thermo: -30 degree centigrade till 50-degree centigrade;. Hygro: 0% till 100%. Baro: 960hPa to 1,060hPa .- Different dial face design & color available;- Different variety ...