Dynamite 30A Brushless Marine ESC for RC boats.

Dynamite is a brand known for producing high-performance
electronics for radio-controlled (RC) vehicles, particularly
focusing on speed controllers (ESCs), batteries, and chargers.
They are a popular choice among hobbyists for their reliability
and advanced features, catering to both entry-level and
professional RC enthusiasts.
This specific ESC is designed for marine applications, meaning
it's built to withstand the harsh conditions of water and humidity
often encountered in RC boating. The "30A" rating indicates its
capacity to handle up to 30 amps of current, suitable for a
range of RC boat motors, and its compatibility with Li-Po and
Ni-MH batteries offers flexibility for users.