Revain sells several of these models which appear to be identical except for the colour. I chose this VXSCAN brand because it had many 5-star reviews, relatively few 1 reviews, and was in the middle of the price range. On my 2012 Chevy Impala it took 3-4 seconds for the sensor to beep the car with the reset tool antenna on the tire near the rim. On the fourth bus, I saw that the low battery LED started flashing dimly a few seconds after pressing the TX button, but still reset the sensor. Others have mentioned short battery life. Out of curiosity I checked the battery after removing it and it still showed a good mid-range on the battery tester. I ran the reset tool with a desktop power supply and saw a current draw of 180mA at 9V. Could this be quite a drain on this type of battery?