My 5 in 1, mdl 01536, quit receiving signal from sensor. Replaced batteries in display and sensor and went through 3 ft sync process. Had multiple bars for wireless. Returned both units to previous locations and they loose wireless connection within minutes. Sensor is about 18' in the air, so plenty of height. Signal comes back when i am within about 10 ft of sensor. Wireless signal has dropped significantly. Original distance was only about 30 ft from sensor to display. Replace with new lithium batteries. Have gone through steps multiple times.