Be confident in your purchase we're an Authorized Cobalt Aquatics Dealer. How cool is that?!?!? Features: Fully submersible heater Modern, super flat design Easy read thermometer and temperature setting Electronic thermostat from 68F - 94F, accurate to 0.5F Shatterproof outer casing The Cobalt Aquatics Neo-Therm Pro fully submersible electronic heaters feature innovative circuitry that constantly varies the power consumption of the heater depending on current tank conditions to maximize performance, energy efficiency, and safety. The advanced electronic thermostat is accurate to 0.5 and includes a LED that displays both the Set Temp and Tank Temp simultaneously. The heaters also have automatic shutoff circuitry to prevent overheating and its shatterproof outer casing make the Neo-Therm Pro heaters virtually indestructible. Perfect for freshwater and saltwater aquariums and terrariums. SPECIAL NOTE for use with Aquarium Controllers: Please set temperatures higher than temperature of heater on all controllers. APEX users: Please be sure to plug your Neo-Therm Pro into plug 4 or 8. Digital Aquatics users: Neo-Therms can be plugged into any port without issue.