The second one is integrated signal acquisition device made up of sensor, front end circuit, data-showing meter, USB data acquisition card and power supply.

集成式信号采集装置包括传感器、前置器、数显表头、USB数据采集卡和供电电源；

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On dictation equipment, a device that gives an audible or visual signal at the end of the recording medium.

口述记录设备上的一种装置，当到达记录媒体末端时发出一个声响信号或可视信号。

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Synchronous acquisition system of ECG Signal is the front-end module of ECG device.

心电信号同步采集系统是心电设备的前端功能模块。

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Embedded inside it is a batteryless RF switch, and the way it works is that upon the release of the spring mechanism inside, a tiny bit of power is generated for the 2.4GHz RF transmission ( ZigBee compatible), and whatever device is connected to the RF control outlet on the other end will receive the on or off signal.

ENGADGET: Mitsumi exhibits micro-vibration power generator and batteryless RF switch (video)