Review on Haisstronica Connectors: Ultimate Marine, Heat, and Waterproof Solution by Frank Rivera

I upgraded Ambulance and almost all connections are soldered and heat shrinkable. I gave it 3 stars because of the amount of heat it takes to actually melt the solder ring inside. The required amount will inflate the heat shrink tubing itself. It is easy to use for horizontal work. For vertical work you need another pair of hands. I like the water resistance it has.