The TC2670V is one of the most affordable "complete" Dual Refrigerant Management Centers in the world. The TC2670V model automatically removes all refrigerant from the vehicle's system by detecting pressure and restarting the compressor as necessary- no assistance needed! Charging is just as easy. Turn machine to charge and the internal cylinder fills the A/C system to capacity in one step with the vehicle off - usually in less than a minute! It's that easy. Operation is as easy as 1-2-3!1.Recover/Recycle 2. Deep Vacuum 3. Charge