Woot has Ultimate Ears Wonderboom Play Portable Wireless Bluetooth (Black) for $36.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.

Thanks to Deal Hunter PennyFound for finding this deal.

Features:

• 10 Hours of Play: Get 10 hours of booming sound with a single charge of this waterproof portable speaker
• Virtually Indestructible: The WONDERBOOM PLAY Bluetooth waterproof speaker is rated IP67 waterproof and dustproof and even floats in water
• Double Up for Stereo: Pair two WONDERBOOM PLAY portable Bluetooth speakers for even bigger sound; press once to double up; press again for true stereo from both speakers, with left and right channels
• Extremely Portable, Reliably Wireless: 131ft (40m) of wireless range plus a new hand loop design makes this wireless speaker easy to grab, carry, and enjoy—anywhere
• Made With Recycled Plastic: Plastic parts in the WONDERBOOM PLAY wireless Bluetooth speaker include a minimum of 68% post-consumer recycled plastic by weight
• USB-C Cable not included