Add to Cart Quick view EF Johnson NEW Key & On/Off switch for the Desk KW Amplifier & 500 Transmitter EF Johnson MSRP: Now: $24.99 Was: This Brand New Key & On/Off switch for the EF Johnson Desk KW Amplifier & 500 Transmitter, Is the original Switch and key made by the Arrow Hart Company. This original part is very hard to find. Many of the KW Desk Kilowatt... MSRP: Now: $24.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $24.99 Was: Subtotal: Add to Cart