These are at USD 69.99 again. I bought 2 last time they were at this price about 6 weeks ago (in addition to the one I already owned) - and have not bought now - so have not gone through the process to check if the price is only for Prime customers (a month free is available every 12 months if you are not) and exactly what the AUD price is including shipping. When I bought it was about AUD 105. These prices often only last a number of hours - but I noticed I received a camelcamelcamel notification about this price nearly 24 hours ago - so it has been at this price for a while. I would hurry to order if interested at this price.
The hub is powered via a micro-usb wall plug - which is US style - so you need a US-AUD adapter - or just an AU micro-USB wall plug and cable. I'm guessing most people have a few spare ones these days.
You can also get a USD 5 referral credit using random code linked below - which is a one-off for install and first purchase with Amazon app.
Text from the product page -
Use your smartphone (available Harmony Smartphone app) or the included Harmony Remote to control your entertainment devices
Smartphone app includes Swipe and Tap control for one-touch control of your entertainment system, up to 50 favorite channel icons, volume, media playback, and more (Works with iPhone iOS 6.0 or later and Android 4.0 or later)
Included Harmony Hub lets you control devices hidden behind cabinet doors or walls, including game consoles such as PS3, Wii, and Xbox 360
Future-proof control of up to 8 devices: Works with over 270,000 devices including cable TV boxes, Apple TV, Roku, Sonos, Amazon Fire TV, Phillips Hue, Xbox One, PS3, and TV-connected PC or Mac
Shipping $9.48(usd)