● 小巧轻便,方便安装;
Small and light, easy to install;
● 使用寿命长;不换电池 3 年以上;
Long service life;
more than 3 years without changing the battery;
● 识别距离远,灵敏度高。
Long recognition distance and high sensitivity.
● 内置可更换扣式 CR2477 电池一颗,工作电压 3V;
Built-in replaceable button type CR2477 battery,
working voltage 3V;