The Riddler's Cane is a cane with a question mark as a handle. It is one of the many objects featured in the DC Comics and media.
The cane has a variety of technological devices and weapons. It used mainly as a remote control to his devices. Riddler uses it to hack into security devices. It can be also used a tazer and a sword.
Appearances in other media
In Batman Forever, he uses the cane as a hacker to gain access to the Batcave.
In the animated series The Batman, the Riddler uses his cane as a remote to control his machines.