Get expert guidance throughout the recharge process with the A/C Pro Ultra Synthetic R-1234yf Recharge Kit With Smartcharge. Using Bluetooth, this kit features a Smartcharge gauge that wirelessly connects to your phone through the A/C Pro app. Once connected, the app provides guided instructions specific to your vehicle, taking the guesswork out of the process. Recharging your vehicle's AC by yourself is easy and straightforward. This advanced formula not only provides colder, drier air, but it also contains anti-wear additives that help extend the lifespan of the AC system. Plus, this auto refrigerant seals common leaks and helps prevent the harmful effects of contaminants such as oxygen. Use this AC refrigerant kit to recharge all R-1234YF vehicles, including hybrids and electrics. A gauge and hose are included for easy convenience. Take on car care yourself by recharging your vehicle's AC. Nothing cools like A/C Pro (TM).