You can also check EHEIM Jager Double Suction Cup Holder and EHEIM Jager Aquarium Thermostat Heater 125W for a better comparison at Aquariumheaters.us.

Eheim Jager Aquarium Heater With TruTemp Product Description:All 7 Heater 100% fully with dial the user to re-calibrate heater +/- 0.5F degree for your Before working installing a submersible be sure to understand and Step 1 Attach sticker around light.
Attach suction to Attaching both suction cups proper positioning aquarium and will allow adequate circulation around the heater for heat distribution.
Suction should be in the to Step temperature: Turn the adjustment knob it to the desired temperature. aquariums vary, be desired 3 Heater installation: Install in aquarium.
The heater.
Login to see all details