The backlight has adjustable time-out to preserve battery life.
背光灯有可调节的超时功能以维护电池寿命。
Ultrasonic power supply built-in, power adjustable, time is adjustable, desktop structure, easy to operate.
超声波电源内置，功率可调、时间可调、台式结构，操作简单。
Ultrasonic power supply built-in, power adjustable, time is adjustable, desktop structure, easy to operate.
超声波电源内置，功率可调、时间可调、台式结构，操作简单。
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