Lifegard Aquatic Quartz Heaters are made with submersible quartz glass. Quick and easy to install-  just use the suction cups to secure heater in the desired area. Safe for both saltwater and freshwater. UL listed and equiped with thermal protection, these heaters will shut off if outside water.  These heater are non adjustable and set to 78F. Easy to read LED light indicator with three color modes of operation.
 
Fully submersible aquarium heaters
High quality, break resistant quartz glass construction
Set to 78 F 
Visible LED indicator Red- heating, green when at 78F, and yellow when outside of water. 
Thermal protection  / UL Listed
6 foot power cord