Sota Bio Tuner Model BT8. Includes a black strap and carrying case. Bio Tuner Model BT9 The Bio Tuner developed by SOTA Instruments for over 24 years Supports the mind-body connection by offering harmonic frequencies that help create an inner sense of calm, balance and tranquility Comfort Settings: Choose from 6 modes, including the Earth (Schumann) frequency Simple-to-Use: Comfortable ear clips enable use while going about your daily routine Very lightly used. I have a set of 5 Sota machines from Dr Bob Beck. I will discount significantly if you want all 5. Bio tuner Silver pulser Water O3zonater Light works Magnetic Pulser