Power up smarter and safer. Needing a jump start is never convenient. MYCHANIC Smart Cables take out the guess work and get you on the road quickly and safely. These booster cables are a jump above the rest with two unique features: Voltage meter for real time readings – make sure your battery is the reason your car won’t start Reverse polarity protection – instead of sparks, you’ll get a beep and flashing light if you connect the cables backwards One of the challenges with jump starting a car not connecting the cables backwards. Our smart booster cables take out the guess work. The reverse polarity indicator tells you if the connection is incorrect via both a red flashing light and a beep. The voltage meter lets you know the level of your battery, so that you can diagnose prior to jump starting your car if the battery is the root cause of your car not starting.