Simple to hook up phone surface mount block then plug your phone in. Snap on cover with adhesive mount or screw in. Available in 4 Contact (RJ-11). or 6 Contact (RJ-12) Convenient screw terminal connections. Phone surface mount block sometimes called biscuit block these phone surface mount blocks come with sticky so you can stick it to the surface or you can screw it in. No need to knock a hole in the wall. Just use this voice jack block for your phone. RJ-11 or RJ-12 connection. Pop off cover and connect wires to the screw terminals, it's that simple.