4位电子密码锁 lcd1602显示 四位密码可随意设定 开锁成功有灯光提示 并可修改密码。还具有重新输入功能，手动上锁功能，掉电存储功能，解锁次数1~9次任意设定功能，解锁次数显示功能，产生随机密码并利用其进行解锁或解锁成功后将其作为新密码

Packet : 新建 Microsoft Word 文档.doc filelist

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