The BT7 Bio-Tuner is an electronic relaxation system. The BT7 (bio tuner, formerly brain tuner) by Dr. Bob Beck has been helping people relax for over 20 years. Bio Tuner is an experimental, battery powered electronic instrument that delivers minute levels of relaxing energy to the body through electrodes.

The BT7 Bio-Tuner is based on technology originally developed in Russia in the Fifties as a sleep aid, for which it was termed electrosleep. Researchers observed that the treatment not only helped with sleep, but also reduced depression and enhanced alertness. Many years and many studies later, Cranial Electrical Stimulation (CES) is now used for neurotransmitter balancing, mood control, IQ gains, sleep, peak performance, drug and alcohol addictions, depression, anxiety, headaches, and much more.

Most people who use the Bio-Tuner describe the experience as focused deep relaxation, even when high stress or anxiety have been present.