Who makes it?

The only Swift electric heli I have heard of is a big one made by Century (a company that has been making large R/C helis for 20 years). I have three and love them. These Swifts use 520mm to 560mm mainblades (a rotor length over 4 feet) and would certainly not be flown in a house.

Seems they are encroaching on the great reputation of the Century Swift. [:@]

If it is an obscure brand, made by an obscure manufacturer, you may consider checking with the people you bought it from for advise.