sorry for being negative, but I really can't believe, that somebody with at least one brain cell will buy this "miner n router something" cheap box.
*802.11 g/n - obsolete technology from 2009, all new devices from 2014/2015 supporting already ac standart
*only 2.4GHz - due to wireless noise in 2.4 almost unusable especially in populated areas
*no sma connector for external antenna
*very cheap chinese plastic look with typical ugly looking font
*shipping costs are quite high compared to price of product
*electricity consumption is higher than my mikrotik routerboard and cisco access point combined
from marketing point of view, this is masterpiece like "mining bulbs" from bitfury. in reality, it is just using bitcoin brand to sell something, what will never you mine single bitcoin. if you want to be in solo mining block lottery, just buy some used mining USB key from marketplace section and connect it to anything. as bonus, you will learn something new and there is also possibility to switch a pool.
while ac is fast it has higher latency.. n is actually better for something that requires low latency. this brings me to 5ghz.. while its nice to have the channels 5ghz has to offer, it doesnt pass through walls very well and you can forget about brick or concrete..
according to the post just above yours, it seems to be made out of black aluminum, not plastic..
as for an antenna.. it probably has an internal one, if you really wanted you can probably drill a small hole and add a sma connector for an external antenna.. it cant be that hard.
also i got one of these because i have a regular router in bridge mode attached to my s5 out in the garage..
yes it was a tad more expensive then a router purchased online, but not by much.. it was 29$ plus shipping.. came to 45$
a router that has a usb connection is about the same.. yes you can get cheaper routers.. amazon has some N ones for 19$ plus shipping but those are very basic.. a good N router is 80$+ an AC router is around 150$
this seems to use the same UI for the router as the S3 had for the networks.. you should be able to assign virtual networks and it probably even has a very capable built in firewall.
so this is ideal for what i need.. plus i plan on adding a powered hub to see if i can power a couple of sidehacks usb sticks.