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The frequency on a metal detector is indicated in kilohertz (kHz, or 1000Hz). Frequency is the number of times a signal is sent and received by the detector every second. For example, a metal detector operating at 6 kHz will transmit and receive 6000 times per second; and at 50 kHz, this happens 50,000 times per second.
The headphones will extend battery life, increase privacy and increase your ability to hear signals clearly against background noise. They even offer benefits to those with excellent hearing. Clear sound is usually more important than a broad frequency specification. In most cases, headphones with a higher impedance (100 ohms) provide clearer sounds.
Rechargeable batteries will save you money if you use your metal detector frequently, at least once or twice per week. If you only use your metal detector once a month, rechargeable batteries will likely not save you money. Rechargeable batteries provide the same performance as metal detectors.
We ship your order worldwide and it is insured. The shipping provider depends on the item and the destination country, usually via FedEx, DHL, UPS and etc.
