This is a mobile dual-band WiFi router with 6700mAh Battery, a decent competitor to the GL.iNet line of mobile routers. Amazon currently offers a 20% off clip-in coupon.
I've pulled the trigger and will be installing OpenWrt on it. I'm also going to get one of those MT7612U-based dual-band WiFi USB dongles like this (which are presumably well supported by OpenWrt) to couple it with this router as a WAN port. This way I could share a 5Ghz or 2.4Ghz hotel/Airbnb WiFi Internet and still have a dual-band local network for Chromecast etc.
Wow, you just opened up my eyes in terms of functionality on devices like this. I never considered you could flash your own firmware and set it up exactly as you please. Forgive my ignorance but with this set up it would mean that you essentially have full control over your own router when away from home?