anti lost alarm for child

anti lost alarm for child Wear the transmitter on the childs wrist, and receiver secured to the parent, set a safety distance, when the child is out of the safety distence the receiverwill beep and vibrate to remind the parent,distance can be freely set within 20 meters. * no radialization* Warning tone & vibration to alarm* freely set the distance from 0-20M*This is ideal for protecting your child in public places such as park,garden and so on. * Warning current :40MA * Transmitter current : 1MA * Receiver current :2MA * Frequency : 433MHZ Transmitter44(H)*45(W)*8.7(D)mm WT:9.3g(with battery) Battery:Lithium CR2032×1 Acceptor:60×36×15mm WT:35.5g(without battery) Battery:#7×1 Carton Size79*36*23cm250pcsN.W19KGG.W20kg