G4S, Card Reader, models:

S680	Installation And User Instructions
S813	Installation And User Instructions
S821	Installation And User Instructions
S830	Installation And User Instructions
S844	Installation And User Instructions
S848	Installation And User Instructions
S849	Installation And User Instructions
S854	Installation And User Instructions
S870	Installation And User Instructions
S874	Installation And User Instructions
S874-EX	Installation And User Instructions
S880	Installation And User Instructions