Fisher's 1236-x2 offers coin and beach hunters all the sensitivity they've asked for plus a newly developed third derivative silencer mode that helps to eliminate excessive pops and clicks when searching in trashy areas. Fisher has provided audio threshold at the maximum setting so the faintest target signal can be heard. The 1236-x2 also offers a pre-set iron discrimination setting, volume control with on/off switch and frequency control. You can vary the transmit frequency of the 1236-x2 from 5.5KHz to 5.9KHz to eliminate electrical interference from nearby metal detectors... a must for the competition hunter!