pir motion sensor alarm 

product description:
 YD-S1 human sensor intelligent voice reminder is the use of nine-core electronic intelligent MP3 music player chip for the processing core, TF card for the development of voice memory equipment. It can be used in high voltage areas such as power system power plants, substations and other high voltage areas, military control, public security areas, fire corridors, business outlets, elevators, escalators and other security areas that need to be reminded of the attention, prompt. When the detector detects that someone enters the area, it automatically detects the voice message.
YD-S1 human sensor intelligent voice prompts with a wide range of sensors, the probe high sensitivity, good sound quality, large volume and adjustable, replaceable sound, power can be long-term storage and other characteristics, can be widely used in the following types of voice prompts system.
Features:
 The product is a series of YD-S series voice prompts, simple and stylish appearance, lightweight, easy to carry transport, the use of human induction trigger mode, not only the volume clear and bright, inspiration, more sensitive range and voice replacement and other functions , Work without manual operation. Applicable to smart doorbell, welcome, daily reminders and other occasions.