Dual LCD display shows ambient temperature and relative humidity simultaneously. REED LM-81HT Offers This compact thermo-hygrometer measures temperature and humidity and features Data Hold and Min/Max functions. The LM-81HT is easy-to-use and comes with a wrist strap for one handed field operation. Features Compact and lightweight Dual LCD display User selectable °F/°C Data Hold and Min/Max function Low battery indicator and auto shut-off Included Thermo-Hygrometer Wrist Strap Battery