... wrist strap. You simply attach the wrist strap to your child or valuable item and then simply set the transmitter to ... the ON position. Now, whenever your child/valuable is more than 10 meters away from you the ... this to children, pets, backpacks, purses, etc. SpecificationMaterials: Molded ABS Plastic with Canvas Wrist Strap Transmitter Frequency: 433.92MHz Alarm Output ...