This simple and effective system had to be invented. Yes, yes, we are not going to argue - most modern homes are quite limited in space and sometimes people need very versatile furniture pieces that can be either beds or a sofas! More than that, most of the time it is really usefull to have one of these pieces at your place - extra sleeping spaces come in handy.

Principle is very simple. If your sleeper sofa is in seating position, you have to pull its back till you hear a click. Then you should let the back of the sofa slip to sleeping position. When it's in sleeping position (completely flat) you should pull it into same direction until you hear a click (klik). When you hear it inner mechanism is locking the back of the sofa in this designated phrase, so it will stay up. It's all that simple as that!
Most of sleepers, or klik-klaks as they are called sometime, have 2 positions - seating and sleeping. Sometimes, however, it has a middle position (approx 45 degrees to the floor), providing extra comfort and versatility.
