If you want a multifunction fridge,try going to your local caravan dealer and ask if they are breaking any old tourers or statics.That is how I got mine .From memory it cost £25 quidor so.
Also if you find it does not work at first.Turn it upside down for an hour,turn it back over and run again.They are silent running (i,e no compressor).they run on ammonia,and sometimes it crystalizes and wont liquify properly when heated.So upendening it loosens the crystalsand hopefully "Bob's ur uncle".
Andy