When comparing Sony ECMAW4 vs Alead Nolan LiveMICRX2, the Slant community recommends Sony ECMAW4 for most people. In the question“What are the best bluetooth microphones (excluding headsets) for mobile devices?” Sony ECMAW4 is ranked 5th while Alead Nolan LiveMICRX2 is ranked 8th.
Specs
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Pros
Pro Inexpensive considering size and comparable technology
Pro 75 feet / 23 meter range
Impressive for such a small device. Keep in mind that this range is measured with an unobstructed line of sight. With walls and other challenging objects, the range will diminish.
Pro Small and attractive form factor
Pro Included receiver gives more flexibility and uses for system compared to LiveMIC2
The transceiver can still connect to compatible mobile devices directly by Bluetooth. But if latency becomes an issue such as with an echo effect, the included receiver can be used so long as the mobile device in question has a 3.5 mm jack for the receiver to connect to.
Having a receiver means the system can be setup to work like a Chromecast Audio enabling wired speakers or headsets with wireless capabilities.
It is possible to use a different Bluetooth receiver than the one the manufacturer made and included in this combo, but YMMV. A USB to Bluetooth adapter was a commonly added item on Amazon for the Nolan LiveMIC2, presumably for laptops and computers with less than Bluetooth 4.1 capabilities, so it's a path well traveled.
Pro Potentially better performance for delayed audio issues/ echo effect
Compared to the standalone transciever product from the same company Nolan LiveMIC2. The product description boasts of .02 second latency and that this is 10x lower (faster) compared to other Bluetooth products.
Cons
Con Battery life is only 2 hours
This unit uses one AAA battery and users report that the units only last 2 hours in real world use.
Con Generates handling noise
The transceiver unit creates a lot of handling noise if using the internal microphone. To avoid this it is recommended to use a lavalier microphone plugged into the 3.5 mm input jack.
Con Must use a 3.5 mm jack to connect receiver to your mobile device
Con Latency Lag can still be issue if not using the included reciever
If you use the included receiver, the lag/latency should not be a problem or much reduced at least.
Con Expensive
At this price range, budget analog transceivers and receivers with far better range capabilities are available.