Tips before Using: 1.Equipped with 315/433MHz tire sensor. And A 9V Battery is needed, but is not provided. 2.Please make sure to use a Brand NEW 9V battery, the battery is not included in the package, and the magnitude of the battery voltage affects the signal strength of the product. 3.Please make sure the antenna fits in the CORRECT position. The position of the tires is also important, Front tires have to be straight. 4.Not for heavy trucks with more than 4 tires. 5.The TPMS tool is unable to reprogram sensors, it's a tpms reset tool. 6.Do the tire reset outside instead of in the garage. 7.For different vehicles our tpms tool may need different times to reset all of your tire sensors after rotation. 8.Sensors should be original OEM sensors which well programmed.and make sure your tire sensor is full charged or is under good conditions before use our TPMS tool