Tech
[问与答] 求无手机信号区域儿童定位装置推荐
其实指海上邮轮
手机信号肯定没有，也没法 24 小时连 wifi
有什么可以相对精确定位的儿童用装置呢？要求手机能看到
如果能控制发声就更好了
谢谢
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