... .One unit can match several wristband,no number limited Child siter alarm GS601-A·FM Radio . ·AC-DC ... neighbourhood use· Portable product bag for option ·Use child siter alarm aside lake, in a boat, around ... , just simply strap a frog wristband on the child (or pet).·Plug in the remote base unit, ... from lawn sprinklers will not trigger the alarm. ·Child siter wristbands have a battery life of at least ...