Total of 35 frequencies: 5 main frequencies with 7 wide offsets 3.7 to 4.4kHz, 7.1 to 8.4kHz, 10.5 to 12.4kHz, 15.2 to 17.8kHz, 23.5 to 27.7kHz; Selectable frequency offset without loss of performance; TX power adjustment is available on all frequencies and offsets; Special Low frequency TX Boost feature; Normal or Boost option - the transmitted power has 2 selectable levels when using frequencies 3.7Khz to 4.4kHz; The BOOST mode significantly increases the transmission power of the transmitting coil, allowing greater detection levels if the soil conditions allow; TX boost is a special mode, the battery life of the coil may be reduced down to 6 hours; The overall battery life of the x35 coil has improved on most frequencies by 10% to 40%; High frequencies 23- 27.7kHz - Excellent sensitivity to low conductive targets and small targets; Better overall stability