This service provides access to more than 5 million unique monthly residential IP addresses and has a high success rate. There are constantly IPs coming on and offline with this service and the number of IPs online at a given time will fluctuate.
Premium Residential proxies are priced by the GB. You can find the pricing structure here.
You can geo-target countries, cities, and ISPs with this service. Here is a full guide to geo-targeting.
Premium Residential proxies support HTTP, HTTPS, SOCKS, and UDP protocols by default. You do not need to do anything to enable any of these protocols. Simply connect using your desired protocol on your end.
Both random and sticky ports are available. You can read more about the difference here.