This #7211 hand control is the newer style Limoss hand control used by many chair manufacturers for their standard up/down lift chairs.  This #7211 has a one piece cord that “disappears” down through a hole in the chair and normally plugs in underneath the chair to a short cord off the motor.  It has a round plug with a 90 degree angle that has five pins in a semi-circle.  It has an LED light that comes on when one of the buttons are pressed, and stays on for around 10 seconds, then goes out.