Rode wireless go 2 microphones - cheapest ever! The last deal I found in OZbargain was from earlier this year @ $319.20
This one is fulfilled by Amazon so quick delivery. If you are one of those lucky ones, next day delivery is available for Prime members.
Go 2 has two transmitters and one receiver.
Dual channel wireless microphone system for recording two sound sources simultaneously
Series IV 2.4GHz digital transmission, 128-bit encryption – crystal-clear audio at up to 200m (line of sight), optimised for extremely stable operation in dense RF environments
3.5mm TRS analog output, USB-C and iOS digital output – universal compatibility with cameras, mobile devices and computers
On-board recording – over 40 hours of internal memory
Option to record each channel separately or combine them for ultimate flexibility in post-production
Safety channel, flexible gain control (three-stage pad, expandable to 10-stage)
In-built rechargeable lithium-ion battery – up to 7 hours battery life
Designed and made in RØDE’s precision manufacturing facilities in Australia
Product review - https://www.youtube.com/watch?v=rDcuLhKAQDQ