New discontinued stock. The SB646 is used to toggle between two transducers and one sounder OR one transducer and two sounders. This is for use with single-line transducers up to 1000 watts, please refer to Airmar’s product brochure to determine compatibility. If you are unsure, please message us explaining your specific situation and we will assist in determining compatibility.

Used for testing, comes as shown, may be missing minor parts, all terminals inside the unit are present.

Shipping will be free in the US only.

Thanks for looking!

Terms:

All items sold at Max Marine Electronics come as you see in the pictures provided, with ONLY the parts and accessories shown in the pictures. Do not assume any additional items will be included in your shipment. IF YOU DO NOT SEE SOMETHING YOU EXPECT TO BE INCLUDED IN THE PICTURES WE PROVIDE, IT WILL NOT BE INCLUDED. Read all descriptions thoroughly. There are times a display is used ONLY to show the item being sold is functional and working properly. In this case these displays ARE NOT included, this will be stated in our descriptions. If you have ANY questions feel free to send a message or call Max Marine Electronics Inc, Pompano Beach, Florida. We always want to be transparent with our customers and fully disclose any information regarding the products we sell.