With the growing popularity of high voltage setups on R/C model helicopters, EDFs and airplanes,sparking battery connections are increasingly becoming the biggest enemy to your electronics.All the anti-spark systems in the market today require some sort of modification or DIY work before use.Now, we have just the solution. XT-90S is based on the popular XT90 but now integrates an anti-spark system. With the XT90-S, no need to invest to a secondary anti-spark system (which provides an additional failure point to your system). 100% compatible with existing XT90.Comes with a soldering cover to protect the solder point.Spec.Weight: 15.3g(Each Pair)Size: 49x21x10mm(Each Pair)