Technical specification and features:
   *Can measure and display 1 group temperature and 1 group hygrometer
   *Temperature range: -40℃～70℃
   *Hygrometer range:20%RH～90%RH
   *Temperature accuracy : ±1℃
   *Hygrometer accuracy:±5%RH
   *Temperature result:0.1℃
   *Hygrometer result: 1%RH
   *LCD display
   *Have record the maximal and minimum function
   *Display mode: ℃/℉
   *Battery:1.5Vction