以下是富士金属探测器 F-90M 产品的中英文介绍：

富士金属探测器 F-90M 是一款设计精良、功能实用的探测设备。它采用小型可折叠构造，便于收存和携带，无论是户外探险、海滩寻宝还是工程现场探测，都能轻松应对。其配备的防水探测天线，可在水中进行金属探测，大大拓展了使用场景。该设备还具备高灵敏度，能够有效降低周围寄生效应和不明物的影响，确保探测结果的准确性。此外，复位键的设计使其能够对不同探查方位的探测感度进行再调整，以适应各种复杂的探测环境。F-90M 可探测多种金属物体，如埋设在雪场、沙滩下的金属硬币，集装箱和货箱中的金属物，以及建筑工地、沙土、雪地等环境中埋设的检查井、阀栓、水表等。其工作温度范围为 -10℃至 +60℃，电源为 DC6V 干电池，可连续工作 25 小时以上。

The Fuji Metal Detector F-90M is a well-designed and functional detection device. It features a compact foldable structure, making it easy to store and carry, suitable for various scenarios such as outdoor exploration, beach treasure hunting, and construction site detection. The waterproof search antenna it is equipped with allows for metal detection underwater, greatly expanding its range of applications. The device boasts high sensitivity, effectively reducing the impact of surrounding parasitic effects and unknown objects to ensure accurate detection results. In addition, the reset button enables it to readjust the detection sensitivity for different detection directions, adapting to a variety of complex detection environments. The F-90M can detect a wide range of metal objects, including metal coins buried in snowfields and beaches, metal objects in containers and cargo boxes, as well as inspection wells, valves, and water meters buried in construction sites, sand, and snow. It has a working temperature range of -10℃ to +60℃ and is powered by DC6V dry batteries, with a continuous operation time of over 25 hours.