Update:
Last week I received the iDSD signature and I was noticed the iDSD neo is on its way. That pair may get a double feature review.
I did a couple of shots over the weekenbd which will be posted here today or tomorrow.
 

on 10 / 09 / 2020
By chance (searching for some iFi iDSD pro information) I noted today on the iFi website that the company announces a new version of the iDSD micro.

https://ifi-audio.com/products/micro-idsd-signature/

They say it is "Out of this world:"
"- Sporting a Space Blue finish and powered by a built-in rechargeable battery, the micro iDSD Signature is a transportable DAC/headphone amp that’s ready for anything that the universe throws at it.
- Battery power means it’s ultra-clean with ultra-stable DC power and avoids the pitfalls of AC mains – dips, spike and noise-inducing RFI/EMI pollution.
- And with up to 12 hours playing time, depending on the headphones and performance mode engaged, it feels like you could take it to the moon and back."



New seems to be some circuitry and the 4,4 mm Pentaconn output. Here's the link to the manual
https://ifi-audio.com/wp-content/uploads/2020/10/micro-iDSD-Signature-User-Manual_1.0.pdf

Gearslutz notes:
" The iFi micro iDSD Signature is available later this month from selected retailers, at an RRP of £649, (€699, US$649). Only a limited number will be made, so those wishing to get hold of the Signature edition of iFi’s landmark transportable DAC/headphone amp should act fast to avoid disappointment."

The perfect gift for iFi fanboys and those who who want to get there. ;-)
Based on my iFi micro iDSD BL which I use in this moment writing the news listening to Fink's "Bloom Innocent - Acoustic" via the HD650 phones, I think this may be money spent well on a versatile & excellent digital analogue conversion. I use the BL DAC since 3 years in the main system or as hp amp at my desk without noting any flaw and great excitement when pushing through DSD512 (under ROON)