http://www.braintuner.com/Bob-Beck-Brain-Tuner/
Please note that the names BT-7, Bio-Tuner and Brain Tuner all refer to the same instrument. The original name is the Brain Tuner. There is a product called the BT-9 on another website. This is not related to our BT-7.

Zie BIO-TUNER Sota, want dat staat op het apparaat.