T-Mobile offers the JBL Flip Bluetooth Wireless Speaker in Black, model no. JBLFLIPBLKAM, for $99.99. Coupon code "SAV30HOLI" cuts it to $69.99. With free shipping, that's $20 under our mention from a year ago and the lowest total price we've seen. (It's a current price low by $28.) It features a built-in microphone, two 1-5/8" drivers, and up to five hours of playback per battery charge.
These tools and conveniences will help protect drivers from hassle, danger and calamities on the road.