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.  This heater is adjustable and has a set range of 68 - 88 F.  Easy to read LED light indicator with three color modes of operation.
 
Fully submersible aquarium heaters
High quality, break resistant quartz glass construction
Set range 68 - 88 F
Length 10.5" 
Visible LED indicator Red- heating, green when at 78F, and yellow when outside of water. 
Thermal protection  / UL Listed
6 foot power cord