√ 10-30psi adjustable√ Faster speed and more accurate among like products√ Easy to preset them at different pressure before use in seconds√ Deviation correction aginst different gauges and tires in seconds√ Excellent Workmanship√ 100% Tested√ Material:Aluminum√ Protective storage tin box√ Competitive Price√ Shipping From US----------------------------------Vtonsports automatic tire deflators PRO version is the fastest and simplest. They allow people to easily adjust pressure from 10psi to 30 psi. Our deflators are reliable and they were developed for all possible climate and environment. Due to simply dialing design, you can set the deflators at different pressure easily in seconds. They will accurately and consistently deflate each tire and stop automatically at the pre-set PSI. If you frequently airdown for offroad adventures, then you must have vtonsports automatic tire deflators pro version. They will saving your time and knees a lot and make your offroading more enjoyable.With the help of those auxiliary scales, People can do deviation correction aginst different brands of gauges and tires in seconds. In this way, they can deflate their tires to very precise pressure. eg. ±0.5psi ~ ±1psi. Following Questions Are Commonly Asked: What does this professional version design for (VS Gerneal version)? Allow people pre-set the pressure in seconds before using. They will save your time, because never need a tire to do that as the general version. Auxiliary scales designed to eliminate the variation of different brand of pressure gauges. And they also allow people to pre-set a non-five-times pressure easily. How to use them? Step1: Preset the psi by turing the adjustment ring to designed position.Step2: Screw onto the valve stem of the tires.Step3: Screw off once it stops and stock.Note: Sometimes if tire pressure is too close to the deflator preset, you may need triggle it by to lifting the plunger slightly. Eg. tire pressure is 23 psi and the deflator is set to 20psi. Is there an warranty?We provide 2 years waranty. So, feel free to contact us whenever you have any trouble when using them. What can you expect on this version?1. Easy to use: 10-30psi adjustable.2. Fast Air-Flow. 3. Accuarcy and consistency: ±2 psi.4. Reliability: less impact on accuracy at possible working enviroment. Note: All deflators are tested with our calibrated precise pressure gauge. Data shows that variation between different brands of gauge can be up to 2psi. you can use auxiliary sacles to eliminate this deviation. But if your data out of ±4psi, please contact us directly, we will provide a solution.