MK-701 is a stripped down version of the MK-706.  Identical mechanical mechanism to the MK-706 iambic paddle.  No base.  Can be mounted directly onto a table, user-supplied base material, or use the paddle as-is travel style - weighs just 3.5 ounces.  2.675" x 3.25".  
4 corner screw holes for mounting.  Cable can be connected to screw terminals on the top of the key or solder lugs under the base.  
Economy priced at $79.95.