Dell Home offers the Logitech Ultimate Ears Boom Portable Bluetooth Speaker in Superhero, model no. 984-000596, for $199.99. Coupon code "BOOM100" drops it to $99.99. With free shipping, that's tied with our mention from three weeks ago as the lowest total price we've seen for a new unit. (It's the best deal for any color today by $19.) This waterproof speaker features a 90Hz to 20kHz frequency response, 3.5mm auxiliary input, Bluetooth, 49-foot transmission range, NFC, and rechargeable Li-ion battery with up to 15 hours of music per charge.

Also available is the Logitech Ultimate Ears Boom Portable Bluetooth Speaker in Superhero, model no. 984-000446, for $99.99 with free shipping via coupon code "AUDIO100". That's the best deal we could find by $29. The features for this water-resistant speaker are similar to those above, but it also has two built-in microphones. Both deals end May 23.