Select Channel and SYNC:\r\nPress CH/SYNC once to select a channel.\r\nShowing dashes or outdoor temp do not appear:\r\n1.Re-install the display screen battery.\r\n2.Press the reset button \"TX\" on the back of the outdoor sensor until the outdoor temp appears on the display screen.\r\n(slide the outdoor sensor cover down to see \"TX\").\r\nNote:\r\n1.To start reading the exact value, need to wait 30 minutes.\r\n2.Don\'t immerse the product in water, the outdoor sensor is rain-proof IP X3, but to extend its life place the sensor in an area protected from the rain or weather elements.\r\n3.Make sure both units are placed at least 3 feet (9m) away from electronics that may interfere with the wireless communication (such as TVs, microwaves, computer).\r\n4.The outdoor sensor must be vertical placement. Don\'t put it directly on the ground, The best location is 4 to 8 feet above the ground.