Built-in zoom lens, night vision distance of 50 meters;
内置变焦镜头，夜视距离达50米；
Built-in night vision products into the lens, night vision distance of 50 meters;
内置进品夜视镜头，夜视距离达50米；
Perfect Night Vision binocular for long range observation has multi-coated 90mm glass lenses for optimum clarity and distance.
完美的夜视远距离观察双眼具有多涂层的最佳距离90毫米的清晰度和玻璃镜片。
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