The Dual Tester can be used to check whether your LG Sonic® is still working, sending the correct frequencies and if ultrasound is being spread throughout your whole water body.

• The DualTester is being provided with a receiver. You can place this in the water to measure whether the sound is covering the water surface properly.
• You can plug the Dual Tester to the transducer-output on your LG Sonic.
  It measures whether the power box is still generating ultrasound and if the correct frequencies are still used.