The FX12 gray sonde/transmitter operates at depths of up to 19.8 meters. It is compatible with all DigiTrak F2 and F5 locators. Frequency: 12 kHz. The probe transmits 12 clock positions and inclination with an accuracy of 0.1%. It switches to standby mode after 15 minutes. This model lasts three times longer than the original sonde! And also not afraid of working in percussion instruments.A unique algorithm of adaptive nonlinear signal filtering overcomes sharp jumps in readings during severe vibrations. Amazing stability of these transmitters while speeding up the sonde's response to changes in slope. 1 year warranty.Free shipping.