key 4dNord Electro 4D SW61: 61-key (5 octaves, C-C) Velocity sensitive Semi Wehted Waterfall keyboard. Nord Electro 4 SW73: ... Memory Nord Electro 4D SW61. 185 MB memoryTransponder Keys From Aftermarket with Product Number: MK1021 This Weht Product: 22g Specs: Color: Black Manufacturer: Aftermarket Condition: