Interesting Device, it comes in 2 versions

  one u can attach it to your child and if he/she wanders off more than 25feet, it will alert you. Has a range of 150feet and you can press a button to hear an alarm to locate your child. 
The bad thing about this is the alert, you can't turn it off, if you leave your kid at a playground and you wander off, it will keep alerting you that your child is out of range.

  The other one is just a locator, it will not alert you if your child wanders off.

Hmm should i get one for Chloe?

  Below are some sites that sells this but most do not send to Singapore, guess will have to use Vpost for such things.