OK to have. Certainly not required. I did mine as cost effectively as can be done. Series has an app for you phone if you have it in any car. So I got a bluetooth speaker from Amazon for $20, mounted it under the dash and it has a plug for my USB port to keep it charged. Paired it to the phone and it works great. Total cost $20. Biggest issue is because the cart is open and somewhat noisy, it has to be to loud to be effective.
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Life is to short to drink cheap wine.
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