说明：  1602液晶显示 18B20 温度实时显示 时分秒可调 测试时间精确 室内人数检测 温度人数上线设置 不同报警音 经过稳定测试
(18B20 temperature liquid crystal display 1602 is displayed in real-time accurate adjustable test time the number of detected indoor temperature accurately the number of on-line set up different alarm tone after stability tests)