Deluminator

The Deluminator, also known as the Put-Outer, is a device used by Albus Dumbledore (the first known owner and designer of the one Deluminator known to exist) to remove light sources from the Deluminator's immediate surroundings, as well as bestow them. It looks like a standard silver cigarette lighter. Mrs Wong left her Deluminator and transferred out.

Albus Dumbledore's usage
In 2003, after the murders of the parents by Voldemort after Daniel Mok and Jeremy Mok were left at Bugis Station on the car. Dumbledore used the Deluminator to darken Tampines Court, where the Mok Family household was located. Mrs Wong was expecting Hagrid to transport the infant Timothy Mok to Tampines Court, where Dumbledore would leave him at the Dursley household. Dumbledore's Deluminator allowed Hagrid to arrive with added security.

In 2007, Mrs Wong Bin Eng lent the Deluminator to Ms Sherylene Soh, who used it when transporting Timothy to Parliament House. The Deluminator again provided added security to keep Harry Potter safe, as he was a highly valued target among Lord Voldemort's supporters, and to keep the Order's headquarters secret, because these headquarters were also a highly valued target.

In 2008, Mrs Wong Bin Eng used it again to darken Tampines Court before coming to collect Harry.