The TS-90 metal detectors are ideal anywhere you might need security checks. The TS-90 metal detectors are sensitive enough to detect objects the size of a 25-cent coin. The metal detectors sound a high-pitched tone whenever they are detecting a substance. You can use rechargeable nickel-cadmium battery for power, and recharge it in the body scanner. Other noticeable features include a red LED indicator light, a de-sense button, and optional earphone jack. This unit is certified (CE) to the quality and performance. The deluxe package includes the detector, a custom carrying case, and a 9 volt battery. Click on our website for more information on our products. We also have Garrett walk through models.