Личная анти-потерянный сигнал тревоги

SW-AM501 anti-lost alarm Function: Wear the transmitter (smaller one) on the child or the protege, and wear the receiver on the parent or the owner. Set a distance by the wheel, when the 2 devices leave each other more than the set distance, the receiver will sound alarm and vibrate to remind the receiver owner. * no radicalization* Sound: 80DB* 256*256 different codes* Beep & vibration to alarm* freely set the distance from 0-25M* Transmitter current : 1MA* Receiver current : 3MA* 1-1 matching, no interference* Frequency : 433.92MHZTransmitter:33X28X11mmWT:10.8g (battery exluded)Battery:CR2032 1PCReceiver:46X38X15mmWT:35g (battery exluded)Battery:CR2032 2PCS