Try various set-ups for best result. Though the remote sensors are weather resistant, they should be placed away from direct sunlight, rain or snow. BATTERY AND CHANNEL INSTALLATION: REMOTE UNIT The remote thermo-hygro sensor unit uses two (2) UM-3 or "AA" size batteries. Follow these steps to install / replace batteries: 1. Remove the screws on the battery compartment. Select the channel number on the [CHANNEL] slide switch. Select the temperature display unit on the °C/°F slide switch. BATTERY INSTALLATION: MAIN UNIT 1. Gently lift up the tab on the battery compartment door. Insert four (4) UM-3 or "AA" size batteries. Insert the batteries strictly according to the polarities shown therein. Replace the battery compartment door and secure its screws. Replace the batteries when the low-battery indicator of the particular channel lights up on the main unit. (Repeat the steps described in section "BEFORE YOU BEGIN") Note that once a channel is assigned to a remote unit, you can only change it by removing the batteries or resetting the unit. Replace the battery compartment door. 4 LOW BATTERY WARNING When it is time to replace batteries, the low-battery indicator will be displayed for the selected channel. Remote unit Wall-mount Table Stand HOW TO USE THE TABLE STAND OR WALL MOUNTING The main unit has a removable table stand which when connected can support the unit on a flat surface. Or you can remove the stand and mount the unit on a wall using the recessed screw hole. The remote sensor comes with a wall mount holder and a table stand. Main unit Wall-mount Table Stand THE RESET BUTTON This button is used when the unit is operating in an unfavorable way or malfunctioning. To return all user programmed settings to their original factory values, press [ RESET ] by using a blunt stylus to hold down the button...