The 2.4G Wireless Mini Keyboard For Raspberry / Banana Pi is a wonderful combo, 2.4GHz Mini Wireless QWERTY keyboard, TouchPad combo, with USB interface Adapter.
This add-on will allow your lizard make beep and alert sounds, this is very useful if you use your lizard to unlock the Slim Liteon drives, it will notify you when the unlock has been done with an audible alert.
The add-on needs to be installed inside the lizard so require a little bit of soldering knowledge.
Simple 1 wire one solder install speaker for maximus Lizard
Full installation tutorial on http://360lizard.com