Child  Protecting:
Tie the transmitter on the child, and  receiver secured to the parent.
Set a safety distance, when  the child is out of the safety distance, the receiver will beep and vibrate to remind the parent.
Article Protecting:
Tie the transmitter on the protégé , and  receiver secured to the owner. 
Set a safety distance, when  the protege is out of the safety distance, the receiver will beep and vibrate to remind the owner. 

  Specification:
* no radiation

* Beep & vibration to alarm

* freely set the distance from 0-25M

* Transmitter current : 1MA

* Receiver current : 3MA

* 1-1 matching, no interference 

* Frequency : 433.92MHZ

Transmitter: 44×28×8.7 mm

WT: 9.3g（with battery）

Battery: Lithium CR2032×1

Receiver: 60×36×15㎜

WT: 35.5g（Without battery）

Battery: AAA×1